Lumen (unit): Revision history

23 October 2024

• curprev 15:0515:05, 23 October 2024 Dondervogel 2 talk contribs m 13,110 bytes −23 →Lighting: simplify caption undo
• curprev 15:0415:04, 23 October 2024 Dondervogel 2 talk contribs 13,133 bytes +2 →Explanation: I see no mathematics here. Just an equation relating the units lx and lm. undo
• curprev 15:0215:02, 23 October 2024 Dondervogel 2 talk contribs 13,131 bytes −10 since when has "a pair" been a synonym of "about half a dozen"? undo
• curprev 01:1601:16, 23 October 2024 AlphaBeta135 talk contribs 13,141 bytes −29 The caption is more concise undo

22 October 2024

• curprev 02:3902:39, 22 October 2024 AlphaBeta135 talk contribs 13,170 bytes +111 +infobox image undo

21 October 2024

• curprev 01:3901:39, 21 October 2024 Srleffler talk contribs 13,059 bytes −37 Foot-candles are off-topic; certainly not relevant enough to mention in the lead paragraph. undo

14 October 2024

• curprev 04:5304:53, 14 October 2024 24.118.62.152 talk 13,096 bytes +9 Changed to "lm" units before providing the existing approximation. undo
• curprev 04:4504:45, 14 October 2024 24.118.62.152 talk 13,087 bytes +77 The "foot-candle" is still common in the United States, written in many laws. undo

11 July 2024

• curprev 00:4900:49, 11 July 2024 Xybreus talk contribs 13,010 bytes −2 Cited source showed a different value range than quoted and 60w bulbs for sale in the EU are brighter than this undo

24 June 2024

• curprev 05:2605:26, 24 June 2024 Srleffler talk contribs 13,012 bytes −1,033 Rv. source cited contradicts the change in numbers. Large table was pretty uselesss, being just a division table. undo Tag: Manual revert

22 June 2024

• curprev 02:2402:24, 22 June 2024 箫十二 talk contribs m 14,045 bytes −111 As of 2024, LED technology can indeed achieve a theoretical 230 lm/W (actual usage tested at 200 lm/W). Due to variations in specifications among manufacturers and market supply-demand issues, there are still many LEDs on the market ranging from 130 lm/W to 190 lm/W. Therefore, when selecting the brightness of a light fixture, it is essential to pay attention to lumens. undo Tags: Reverted Visual edit
• curprev 02:1702:17, 22 June 2024 箫十二 talk contribs 14,156 bytes +22 No edit summary undo Tags: Reverted Visual edit
• curprev 02:0702:07, 22 June 2024 箫十二 talk contribs m 14,134 bytes +433 No edit summary undo Tags: Reverted Visual edit
• curprev 01:5501:55, 22 June 2024 箫十二 talk contribs m 13,701 bytes +688 Based on a 2013 report from energy.gov in the United States, there are LED package standards established at 266 lm/W and PC-LEDs achieving over 130 lm/W, with a successful prediction that by 2024 the luminous efficacy of LEDs will exceed 200 lm/W, showing the importance and expectations for future LED lighting. undo Tags: Reverted Visual edit
• curprev 01:5001:50, 22 June 2024 箫十二 talk contribs 13,013 bytes +1 https://www1.eere.energy.gov/buildings/publications/pdfs/ssl/led_energy_efficiency.pdf undo Tags: Reverted Visual edit: Switched

7 June 2024

• curprev 12:0012:00, 7 June 2024 AXRL talk contribs 13,012 bytes +96 →Lighting undo

5 May 2024

• curprev 06:5906:59, 5 May 2024 Dondervogel 2 talk contribs m 12,916 bytes +10 →Lighting: power, not energy (the amount of energy it consumes depends on how long it lasts) undo
• curprev 06:0706:07, 5 May 2024 Srleffler talk contribs 12,906 bytes −5 WP:NOTBROKEN undo Tag: Manual revert

3 May 2024

• curprev 16:2816:28, 3 May 2024 Meno25 talk contribs 12,911 bytes +6 →Lighting undo Tag: Reverted
• curprev 16:2716:27, 3 May 2024 Meno25 talk contribs 12,905 bytes −1 →Lighting undo Tag: Reverted

11 April 2024

• curprev 13:2313:23, 11 April 2024 Julesd talk contribs m 12,906 bytes 0 Fix comma splice undo Tag: Visual edit

19 March 2024

• curprev 05:4105:41, 19 March 2024 Jellyfish talk contribs 12,906 bytes −111 Reverting edit(s) by 2001:861:35C4:4D0:E879:363E:AAC6:461D (talk) to rev. 1201504886 by Kinsio: Advertising/promotional content (UV 0.1.5) undo Tags: Ultraviolet Undo
• curprev 05:4005:40, 19 March 2024 2001:861:35c4:4d0:e879:363e:aac6:461d talk 13,017 bytes +111 No edit summary undo Tag: Reverted

31 January 2024

• curprev 20:0120:01, 31 January 2024 Kinsio talk contribs 12,906 bytes −16 Rephrase opening sentence using the phrasing from Luminous flux; while technically correct, the previous phrasing brings in luminous energy and time in a way that is potentially confusing, especially when considering how the SI unit is defined undo

5 December 2023

• curprev 11:2311:23, 5 December 2023 Kencf0618 talk contribs 12,922 bytes −4 →Lighting: Style and condensation. undo Tag: Visual edit

18 April 2023

• curprev 12:2612:26, 18 April 2023 AndersThorseth talk contribs m 12,926 bytes +41 added doi to reference (edited with ProveIt) undo

30 March 2023

• curprev 08:3308:33, 30 March 2023 AndersThorseth talk contribs m 12,885 bytes +45 added link to CIE undo

25 March 2023

• curprev 07:1807:18, 25 March 2023 42.60.20.158 talk 12,840 bytes −284 Misleading, the unit is in itself not a standard by CIE but is part of a group of vocabulary standardised by CIE made for those working in the field, and whose reference and definitions ultimately come from the SI’s CGPM. undo Tags: references removed Mobile edit Mobile web edit

23 March 2023

• curprev 13:5813:58, 23 March 2023 AndersThorseth talk contribs 13,124 bytes +589 added references to the standard definitions undo

14 December 2022

• curprev 12:3912:39, 14 December 2022 Srleffler talk contribs 12,535 bytes −31 Undid revision 1126998874 by Comrade-yutyo (talk) Image is not particularly helpful. This is not a solid-angle dependent unit. undo Tag: Undo

12 December 2022

• curprev 10:1210:12, 12 December 2022 VectorVoyager talk contribs 12,566 bytes +31 add svg image undo Tag: Reverted

27 October 2022

• curprev 17:1217:12, 27 October 2022 NebY talk contribs 12,535 bytes +9 Changing short description from "SI derived unit of luminous flux" to "SI derived unit of visible light emission" undo Tag: Shortdesc helper
• curprev 16:1016:10, 27 October 2022 Dondervogel 2 talk contribs 12,526 bytes −25 rv good faith edit - not an improvement IMO - consider taking to talk undo Tag: Undo
• curprev 15:3815:38, 27 October 2022 Kvng talk contribs 12,551 bytes +25 Changing short description from "SI derived unit of luminous flux" to "SI derived unit of visible light emitted per unit of time" undo Tags: Shortdesc helper Reverted

29 September 2022

• curprev 16:2516:25, 29 September 2022 192.12.181.237 talk 12,526 bytes 0 capitalization as per instructions at {{Template:Infobox unit}} undo

7 September 2022

• curprev 22:5022:50, 7 September 2022 JezGrove talk contribs 12,526 bytes +3 →Explanation: Added thousands separators undo Tags: Mobile edit Mobile web edit Advanced mobile edit
• curprev 21:1321:13, 7 September 2022 Srleffler talk contribs 12,523 bytes −189 We don't need to define the steradian here. It is defined in the linked article, for readers who are unfamiliar with it. Rm overlinking. undo

6 September 2022

• curprev 18:5118:51, 6 September 2022 NebY talk contribs 12,712 bytes +71 +url undo Tag: 2017 wikitext editor
• curprev 18:1518:15, 6 September 2022 NebY talk contribs 12,641 bytes +198 cite SI Brochure 9th edn pp137-138, clarify note, especially in case it becomes detached from this particular text undo Tag: 2017 wikitext editor
• curprev 18:0818:08, 6 September 2022 NebY talk contribs 12,443 bytes +16 →Notes and references: add notelist undo Tag: 2017 wikitext editor
• curprev 18:0618:06, 6 September 2022 NebY talk contribs 12,427 bytes +39 rewrite footnote to avoid any appearance of WP:OR and in hope of greater clarity. Change it to a note rather than a ref - now need to add notelist undo Tag: 2017 wikitext editor
• curprev 16:5616:56, 6 September 2022 172.82.47.242 talk 12,388 bytes +283 adding footnote to "base units" expression: see talk undo

5 September 2022

• curprev 14:1314:13, 5 September 2022 NebY talk contribs 12,105 bytes +2 implement infobox consistently with other articles undo Tag: 2017 wikitext editor

2 September 2022

• curprev 04:5904:59, 2 September 2022 Ava Eva Thornton talk contribs 12,103 bytes −45 Edited infobox undo

26 August 2022

• curprev 23:1623:16, 26 August 2022 Ava Eva Thornton talk contribs 12,148 bytes +32 Updated first sentence per consensus at Wikipedia talk:WikiProject Physics#"International System of Units" or "SI" in leads of unit articles undo

24 August 2022

• curprev 07:1307:13, 24 August 2022 Srleffler talk contribs 12,116 bytes −31 rv. Not necessarily at a "receiving end"; incident on any surface. Don't need that much detail in the lede. undo Tag: Manual revert

23 August 2022

• curprev 13:2813:28, 23 August 2022 66.159.215.7 talk 12,147 bytes +31 Clarified that lux is at receiver undo Tag: Reverted

21 August 2022

• curprev 20:5120:51, 21 August 2022 172.82.47.242 talk 12,116 bytes −3 unspaced dot in compound unit undo

19 August 2022

• curprev 11:4611:46, 19 August 2022 Ava Eva Thornton talk contribs 12,119 bytes −13 Updated in accordance with new consensus on the Template:Infobox unit/doc talk page undo

9 August 2022

• curprev 03:1903:19, 9 August 2022 Srleffler talk contribs 12,132 bytes −13 Move the definition back into the lede, as it was before Nov. 2020 undo