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Why are cool white LED bulbs 4000K instead of 4100K? |
Lightingeye60 |
4 |
3182 |
January 07, 2026, 03:32:49 PM
by merc |
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Weak DyI emission in my Aliexpress 70W 6500K MH lamp |
dor123 |
9 |
3731 |
January 04, 2026, 10:21:17 AM
by James |
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Automotive Xenon Metal Halide Lamp Specs/Compatibility? |
Multisubject |
11 |
4255 |
January 02, 2026, 02:41:41 PM
by James |
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Article: Are Mercury Lamps Still Legal? « 1 2 » |
M250R201SA |
22 |
15142 |
December 30, 2025, 01:51:03 PM
by Maxim |
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Are household LED light bulbs turning purple too? |
Goodlighting2000 |
6 |
4914 |
December 27, 2025, 08:40:57 AM
by Cole D. |
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Rectification of the Philips SDW white HPS lamps during starting |
dor123 |
4 |
3134 |
December 09, 2025, 03:35:03 PM
by RRK |
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Mercury vapour lamp failure |
lg9so |
5 |
4564 |
December 09, 2025, 10:58:58 AM
by tigerelectronics |
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Why are neutral colors less common than daylight in integrated CFLs and LEDs? « 1 2 » |
brap530 |
16 |
28097 |
December 04, 2025, 05:22:42 PM
by Ash |
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A Philips 175W Mercury Vapor Lamp I bought has a broken insulator at the socket |
Mem756 |
4 |
4221 |
December 02, 2025, 08:28:42 AM
by Mem756 |
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Rapid end blackening in T5 fluorescent |
LightsAreBright27 |
2 |
6757 |
November 22, 2025, 03:10:17 AM
by Ash |
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Foil seals on TD halides? |
AngryHorse |
0 |
2076 |
November 18, 2025, 04:01:56 PM
by AngryHorse |
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Dirt on the arctube of my Aliexpress 70W 10000K MH lamp |
dor123 |
10 |
5356 |
November 17, 2025, 04:07:20 PM
by AngryHorse |
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Tridonic Ballasts with failing RIFA Capacitors « 1 2 » |
Em62Kent |
17 |
10638 |
November 16, 2025, 08:37:39 PM
by Ash |
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Plasma Ball Starting Aid |
stillaintjeff24 |
5 |
4963 |
November 15, 2025, 03:39:49 AM
by stillaintjeff24 |
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What color temperature do you prefer for LEDs? Soft white or daylight? « 1 2 » |
Lightingeye60 |
15 |
14670 |
November 12, 2025, 05:31:22 PM
by StefanE |
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Philips 33/640 "emergency use only" fluoresces under 365nm - why? |
Laurens |
9 |
8417 |
November 10, 2025, 11:08:48 PM
by Medved |
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Single-Pin Fluorescent Tubes (Part 2) « 1 2 » |
Multisubject |
23 |
26883 |
November 10, 2025, 09:57:47 AM
by Multisubject |
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Underdriving fluorescent lamp bad for life expectancy? « 1 2 » |
StefanE |
22 |
13194 |
November 05, 2025, 10:42:09 AM
by RRK |
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Different ways of achieving ultra high CRI LED lamps |
Laurens |
7 |
6034 |
November 02, 2025, 02:26:43 AM
by Laurens |
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Philips CPO-T 45w VS CDM-T 35w |
Laurens |
6 |
4055 |
November 01, 2025, 03:32:04 PM
by RRK |
