oSIST prEN IEC 63545:2025

Horticultural lighting - Luminaires for horticultural lighting - Safety

éclairage horticole - Luminaires pour éclairage horticole - Sécurité

Vrtnarska razsvetljava - Svetilke za vrtnarsko razsvetljavo - Varnost

General Information

• Status: Not Published
• Public Enquiry End Date: 20-Mar-2025
• ICS: 29.140.40 - Luminaires
• ICS: 65.060.70 - Horticultural equipment
• Technical Committee: STV - Steklo, svetloba in razsvetljava v gradbeništvu
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 09-Jan-2025
• Due Date: 29-May-2025
• Completion Date: 24-Mar-2025
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: FprEN IEC 63545:2025 - Horticultural lighting - Luminaires for horticultural lighting - Safety

Overview

oSIST prEN IEC 63545:2025 is an upcoming international standard focusing on the safety of luminaires designed specifically for horticultural lighting. Developed by the IEC Technical Committee 34 on Lighting, this standard addresses the unique safety requirements of horticultural luminaires that differ from general lighting products due to their particular application environments and usage purposes.

Horticultural luminaires are electric lighting devices used to stimulate biological responses in plants through optical radiation. Unlike general lighting, these luminaires are often used in challenging environments such as greenhouses and plant factories, where factors like humidity, dust, and UV exposure are more critical.

This standard, anticipated for publication in 2025, complements existing IEC standards on general luminaires (IEC 60598 series) by introducing tailored safety provisions for horticultural applications up to 1000 V supply voltage.

Key Topics

• Scope and Purpose
  Specifies safety requirements for horticultural luminaires incorporating electric light sources, ensuring protection against electric, thermal, and photobiological hazards.

• Photobiological Safety
  Emphasizes protection against possible harm caused by exposure to optical radiation emitted by horticultural luminaires. It includes measures for risk classification and labeling according to photobiological hazard groups.

• Environmental Considerations
  Addresses the harsher environmental conditions common in horticultural settings, such as moisture, dust, and corrosive atmospheres, impacting luminaire durability and safety.

• Construction and Marking
  Includes requirements for luminaire construction to withstand environmental stresses and guidelines for clear marking, usage instructions, safety labels, and photobiological hazard information to inform users appropriately.

• Electrical Safety & Testing
  Defines criteria for wiring, earthing, insulation resistance, electric shock protection, and endurance tests to ensure reliable operation and user safety in horticultural settings.

• Use Classifications
  Differentiates between luminaires for general use and those restricted to professional or industrial use, with tailored safety requirements and photobiological risk assessments.

• Normative References
  Relies on related IEC standards such as IEC 60598 series (general luminaires), IEC 62471 (photobiological safety), and IEC 60730-1 (automatic electrical controls), building a robust framework for compliance.

Applications

oSIST prEN IEC 63545:2025 aims to ensure safety and reliability for a range of practical applications, including:

• Greenhouses and Plant Factories
  Providing optimized lighting that promotes plant growth while guaranteeing electrical and photobiological safety for workers and operators.

• Indoor Horticulture
  Used in controlled environment agriculture, where lighting systems require specialized safety measures due to humidity, temperature fluctuations, and constant operation.

• Supplemental Lighting in Agriculture
  Such as inter-plant lighting that targets light within plant canopies, requiring precise electrical and biological safety handling.

• Home and Commercial Horticultural Lighting
  Ensuring consumer safety when horticultural luminaires are used in residential or retail settings.

• Professional and Industrial Lighting Installations
  Used only by skilled or instructed personnel with additional safety safeguards due to higher risk photobiological exposure or complex environments.

Related Standards

oSIST prEN IEC 63545:2025 should be used alongside several key IEC standards to maintain comprehensive safety compliance:

• IEC 60598-1 & Part 2 Series

  • General and specific requirements for different luminaire types, adapted here for horticultural use.

• IEC 62471 and IEC 62471-7

  • Standards on the photobiological safety of lamps and luminaires, forming the basis for hazard risk grouping and labeling.

• IEC 60730-1

  • General requirements for automatic electrical controls, relevant for safety-related electronic circuits within horticultural luminaires.

• IEC 60068-2-11

  • Environmental testing for salt mist resistance, important for luminaires exposed to greenhouse or outdoor conditions.

This standard aligns with ISO/IEC directives, ensuring international consensus and harmonization of safety requirements for horticultural lighting. Compliance with oSIST prEN IEC 63545:2025 will advance the safety, reliability, and performance of horticultural luminaires globally while considering their specialized application needs.

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Keywords: horticultural lighting, luminaires safety, photobiological safety, IEC 63545, plant growth lighting, greenhouse lighting, horticultural equipment, electrical safety, environmental testing, luminaire construction, inter-plant lighting.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2025
Vrtnarska razsvetljava - Svetilke za vrtnarsko razsvetljavo - Varnost
Horticultural lighting - Luminaires for horticultural lighting - Safety
Ta slovenski standard je istoveten z: prEN IEC 63545:2024
ICS:
29.140.40 Svetila Luminaires
65.060.70 Vrtnarska oprema Horticultural equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

34/1278/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63545 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-12-27 2025-03-21
SUPERSEDES DOCUMENTS:
34/1195/CD, 34/1214A/CC
IEC TC 34 : LIGHTING
SECRETARIAT: SECRETARY:
United Kingdom Mr Petar Luzajic
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
SC 34D
ASPECTS CONCERNED:
Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Horticultural lighting – Luminaires for horticultural lighting – Safety

PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for
any other purpose without permission in writing from IEC.

IEC CDV 63545 © IEC 2024 2 34/1278/CDV
1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 General requirements . 9
9 5 Classification of horticultural luminaires . 10
10 6 Marking . 10
11 6.1 General . 10
12 6.2 Marking on horticultural luminaires . 10
13 6.3 Instruction manual . 11
14 6.3.1 Safety instructions . 11
15 6.3.2 Operating conditions . 11
16 6.3.3 Symbols and labels . 11
17 6.3.4 Photobiological hazard information . 12
18 6.4 Test of marking . 12
19 7 Construction . 12
20 7.1 General . 12
21 7.2 IP rating . 12
22 7.3 Environmental conditions . 12
23 7.4 Photobiological hazards. 13
24 7.4.1 General . 13
25 7.4.2 Horticultural luminaires without restriction for use . 13
26 7.4.2.1 General . 13
27 7.4.2.2 Retinal thermal hazard assessment – weak visual stimulus (780 nm to 1 400
28 nm) 13
29 7.4.3 Horticultural luminaires for Industrial or professional use only . 13
30 7.5 Replaceable source . 14
31 8 External and internal wiring . 14
32 9 Provision for earthing . 14
33 10 Protection against electric shock . 14
34 11 Resistance to dust, solid objects and moisture . 14
35 12 Insulation resistance and electric strength, touch current and protective conductor
36 current . 14
37 13 Creepage distances and clearances . 15
38 14 Endurance test and thermal test . 15
39 15 Resistance to heat, fire and tracking . 15
40 16 Screw terminals . 15
41 17 Screwless terminals and electrical connections . 15
42 Annex A (normative) Photobiological hazard related risk group labelling . 16

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43 A.1 General . 16
44 A.2 Exempt Risk Group (RG0). 18
45 A.3 Risk Group 1 (RG1), Risk Group 2 (RG2) and Risk Group 3 (RG3) . 19
46 Annex B (normative) Safety-related Electronic Circuit (SREC) Requirements . 21
47 B.1 General . 21
48 B.2 Reliability Evaluation . 21
49 B.2.1 General . 21
50 B.2.2 Additional parameter to carry out the test in IEC 60730-1:2020 . 21
51 B.2.3 Compliance with Annex H of IEC 60730-1 . 21
52 B.3 Design review . 22
53 Bibliography . 23
IEC CDV 63545 © IEC 2024 4 34/1278/CDV
57 INTERNATIONAL ELECTROTECHNICAL COMMISSION
58 ____________
60 Horticultural lighting – Luminaires for horticultural lighting – Safety
63 FOREWORD
64 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
65 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
66 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
67 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
68 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
69 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
70 in the subject dealt with may participate in this preparatory work. International, governmental and non -
71 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
72 with the International Organization for Standardization (ISO) in accordance with conditions determined by
73 agreement between the two organizations.
74 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
75 consensus of opinion on the relevant subjects since each technical committee has representation from all
76 interested IEC National Committees.
77 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
78 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
79 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
80 misinterpretation by any end user.
81 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
82 transparently to the maximum extent possible in their national and regional publications. Any divergence
83 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
84 the latter.
85 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
86 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
87 services carried out by independent certification bodies.
88 6) All users should ensure that they have the latest edition of this publication.
89 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
90 members of its technical committees and IEC National Committees for any personal injury, property damage or
91 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
92 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
93 Publications.
94 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
95 indispensable for the correct application of this publication.
96 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
97 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
98 IEC 63545 has been prepared by IEC technical committee 34: Lighting. It is an International
99 Standard.
100 The text of this International Standard is based on the following documents:
Draft Report on voting
34/XX/FDIS 34/XX/RVD
102 Full information on the voting for its approval can be found in the report on voting indicated in
103 the above table.
104 The language used for the development of this International Standard is English.

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105 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
106 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
107 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
108 described in greater detail at www.iec.ch/publications.
109 This document is to be used in conjunction with the latest edition of IEC 60598-1 and its
110 amendment(s); and also the corresponding IEC 60598 part 2 series for general lighting purpose,
111 as follows:
112 • Part 2-1 Fixed general purpose luminaires,
113 • Part 2-2 Recessed luminaires,
114 • Part 2-4 Portable general purpose luminaires,
115 • Part 2-5 Floodlights,
116 • Part 2-20 Lighting chains,
117 • Part 2-21 Rope lights.
118 Where this document states "addition", "modification" or "replacement", the relevant text of IEC
119 60598-1 and IEC 60598 Part 2 series is to be adapted accordingly.
120 NOTE 2 In this document, the following print type is used:
121 − Compliance statements: in italic type.
122 The committee has decided that the contents of this document will remain unchanged until the
123 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
124 specific document. At this date, the document will be
125 • reconfirmed,
126 • withdrawn,
127 • replaced by a revised edition, or
128 • amended.
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130 INTRODUCTION
131 This document acknowledges the need for safety specification for horticultural luminaires, which
132 are considered as additional requirements or deviated requirements comparing with the similar
133 type of luminaires used for general lighting purpose.
134 Compared with the safety requirements for general lighting purpose luminaires, the differences
135 for horticultural luminaires are mainly derived based on following consideration:
136 • Changing of environmental conditions for the application. Horticultural luminaires are
137 normally indoor used, but with horticulture cultivation purpose, the environmental
138 conditions are normally severe.
139 • Changing of application purpose from vision sensation to horticulture use. Photobiological
140 safety requirements and UV resistance requirements are developed based on this nature.
141 The provisions in this document represent the technical knowledge of experts from the field of
142 the horticultural lighting, and are developed in close context with IEC 60598-1 (the Safety
143 standard for luminaires in general) and the corresponding Part 2 of IEC 60598 (the particular
144 safety standard of corresponding type of luminaires for general lighting purpose).
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148 Horticultural lighting – Luminaires for horticultural lighting – Safety
151 1 Scope
152 This document specifies safety requirements for horticultural luminaires, incorporating electric
153 light sources for operation from supply voltage up to 1000 V.
154 2 Normative references
155 The following documents are referred to in the text in such a way that some or all of their content
156 constitutes requirements of this document. For dated references, only the edition cited applies.
157 For undated references, the latest edition of the referenced document (including any
158 amendments) applies.
159 IEC 60068-2-11, Environmental testing - Part 2-11: Tests - Test Ka: Salt mist
160 IEC 60598-1, Luminaires – Part 1: General requirements and tests
161 IEC 60598-2-1, Luminaires - Part 2-1: Particular requirements - Fixed general purpose
162 luminaires
163 IEC 60598-2-2, Luminaires - Part 2-2: Particular requirements - Recessed luminaires
164 IEC 60598-2-4, Luminaires - Part 2-4: Particular requirements - Portable general purpose
165 luminaires
166 IEC 60598-2-5, Luminaires - Part 2-5: Particular requirements - Floodlights
167 IEC 60598-2-20, Luminaires - Part 2-20: Particular requirements - Lighting chains
168 IEC 60598-2-21, Luminaires - Part 2-21: Particular requirements - Rope lights
169 IEC 60730-1, Automatic electrical controls - Part 1: General requirements
170 IEC 62471:2006, Photobiological safety of lamps and lamp systems
171 IEC 62471-7, Photobiological safety of lamps and lamp systems - Part 7: Light sources and
172 luminaires primarily emitting visible radiation
173 3 Terms and definitions
174 For the purposes of this document, the terms and definitions given in IEC 60598-1, IEC 60598-
175 2-1, IEC 60598-2-2, IEC 60598-2-4, IEC 60598-2-5, IEC 60598-2-20, IEC 60598-2-21 and the
176 following apply.
177 ISO and IEC maintain terminology databases for use in standardization at the following
178 addresses:
179 • IEC Electropedia: available at https://www.electropedia.org/
180 • ISO Online browsing platform: available at https://www.iso.org/obp

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182 3.1
183 horticultural lighting
184 application of optical radiation to stimulate biological response of plants and the plant tissues
185 Note 1 to entry: Examples of the application scenarios are plant factory, greenhouse, field application and home
186 application.
187 Note 2 to entry: Examples of the application manners are top lighting and inter -plant lighting.
188 3.2
189 inter-plant lighting
190 horticultural lighting applied within the foliage of plants
191 Note 1 to entry: Supplemental inter-plant lighting is normally used in greenhouses.
192 3.3
193 horticultural luminaire
194 luminaire designed to incorporate sources of optical radiation for horticultural lighting
195 3.4
196 skilled person
197 person with relevant education and experience to enable him or her to perceive risks and to
198 avoid photobiological hazards
199 3.5
200 instructed person
201 person adequately advised or supervised by optical radiation skilled persons to enable him or
202 her to perceive risks and to avoid photobiological hazards
203 3.6
204 ordinary person
205 person who is neither a skilled person nor an instructed person
206 [SOURCE: IEC 60050-826:2004, 826-18-03]
207 3.7
208 industrial and professional use
209 use intended only for skilled or instructed persons
210 [SOURCE: IEC 60050-851:2008, 851-11-12, modified – the word “experts” has been changed
211 in “skilled”]
212 3.8
213 without restriction for use
214 use applicable for skilled persons, instructed persons, and also ordinary persons

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215 3.9
216 critical control function
217 function performed by a discrete component or a component network whose primary purpose
218 is to allow the luminaire to be in compliance with the maximum allowed emission, but whose
219 failure could cause the luminaire to exceed the exposure limits for normal operation
220 EXAMPLE A function that controls the on-state or maintains the duty cycle of a source, where a circuit fault
221 causes the source to unexpectedly energize or to emit higher doses that what is permissible.
222 3.10
223 critical failure mode
224 software or hardware fault which can result in a risk
225 3.11
226 protective component
227 discrete component or component network that has been separately evaluated to reliably
228 perform a protective function
229 EXAMPLE Such components include thermal protectors evaluated to the Standard for Automatic Electrical
230 Controls for Household and Similar Use, Part 2-9: Particular Requirements for Temperature Sensing Controls, IEC
231 60730-2-9 and fuses evaluated to the IEC 60127.
232 3.12
233 protective function
234 function that operates after the occurrence of a failure in the equipment so as to prevent harm
235 to persons or damage to property
236 [Source: IEC 60050-904:2014, 904-03-05, modified – The note 1 to entry and note 2 to entry
237 have been removed.]
238 3.13
239 risk
240 unacceptable potential for overexposure which exceed the maximum allowed exposure limits
241 3.14
242 safety-related software
243 software that is used to implement safety functions
244 [Source: IEC TS 63394:2023 – modified, “in a safety-related system” is removed]
245 3.15
246 safety-related electronic circuit
247 SREC
248 electronic circuit that implements one or more control or protective functions
249 Note 1 to entry: Safety-related electronic circuits can incorporate any combination of active, passive,
250 programmable, and protective components or semiconductors.
251 4 General requirements
252 Requirements given in this document are additional to the requirements in corresponding IEC
253 60598 Part 2 for general lighting purpose luminaires except where in this document alternative
254 requirements or method of measurement are specified.

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255 NOTE At the time of publication of this document, examples of the corresponding IEC 60598 Part 2 for general
256 lighting purpose luminaires are as follows:
257 − Part 2-1 Fixed general purpose luminaires
258 − Part 2-2 Recessed luminaires
259 − Part 2-4 Portable general purpose luminaires
260 − Part 2-5 Floodlights
261 − Part 2-20 Lighting chains
262 − Part 2-21 Rope lights
263 The test sequences specified in each corresponding IEC 60598 Part 2 are applicable.
264 5 Classification of horticultural luminaires
265 5.1 General
266 The classification of luminaires specified in each corresponding IEC 60598 Part 2 applies with
267 the additions from 5.2 to 5.3.
268 5.2 Intended use classification
269 Horticultural luminaires shall be classified according to the intended use as follows:
270 a) Without restriction for use;
271 b) Industrial or professional use.
272 NOTE The installation for horticultural luminaires classified for “industrial or professional use” is intended to be
273 supervised by instructed or skilled persons.
274 Portable horticultural luminaires shall be classified as without restriction for use.
275 5.3 Installation classification
276 Fixed horticultural luminaires for industrial or professional use shall be classified according to
277 the manner of installation as follows:
278 a) Horticultural luminaires used as inter-plant lighting.
279 b) Horticultural luminaires used as horticultural lighting other than inter-plant lighting.
280 NOTE Classification according to the installation manners is specified for fixed horticultural luminaires to distinguish
281 the requirement of protection against dust and moisture.
282 6 Marking
283 6.1 General
284 Marking requirements specified in corresponding IEC 60598 Part 2 apply with the additions
285 from 6.2 to 6.3.
286 6.2 Marking on horticultural luminaires
287 Horticultural luminaires for industrial or professional use, that do not comply with IEC 62471-7,
288 shall be labelled according to the risk group classification according to assessment performed
289 in 7.4. The label shall be clearly visible when the horticultural luminaire is approached by
290 instructed and skilled persons during installation and maintenance.
291 Risk group labels shall comply with the requirement of Annex A.

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292 6.3 Instruction manual
293 6.3.1 Safety instructions
294 This clause is only applicable to horticultural luminaires for industrial and professional use only,
295 which do not comply with IEC 62471-7.
296 The safety instruction shall contain the substance of the following information:
297 a) This luminaire is designed for horticultural application. Do not use this luminaire for other
298 than its intended use.
299 b) Optical radiation emitted by this luminaire can pose a risk of personal injury. Overexposure
300 can result in damage to eyes and exposed skin. To reduce the risk of overexposure, this
301 equipment shall be installed in accordance with the ma
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