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Arc length of Osram HQI-TS /WDL /NDL and /D, question |
dor123 |
2 |
144 |
July 08, 2026, 10:09:03 AM
by dor123 |
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Why do freezer lights go dim more? |
Emersyn |
4 |
258 |
July 11, 2026, 01:07:30 PM
by xmaslightguy |
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How GE Turned Quantum Mechanics Into a Billion-Dollar Industry |
Omnilight37 |
4 |
302 |
Today at 02:15:27 PM
by Omnilight37 |
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Philips SDW drivers |
Lateroo |
3 |
339 |
June 24, 2026, 11:21:51 PM
by Lateroo |
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Cree Household LED bulbs going purple? |
Goodlighting2000 |
1 |
438 |
June 20, 2026, 11:49:11 PM
by Lightingeye60 |
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Light Bulb Manufacturer Opens A19 Plant in USA |
Maxim |
9 |
509 |
July 11, 2026, 02:32:30 PM
by Lumex120 |
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GE making 25W equivalent LEDs? |
Lightingeye60 |
3 |
567 |
June 28, 2026, 12:12:43 PM
by Lightingeye60 |
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Why daylight compact MH lamps, rarely using Dy-Tl-Cs? |
dor123 |
7 |
570 |
June 27, 2026, 07:32:23 AM
by dor123 |
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Why some MH lamps have less bright electrodes than others, during ignition? |
dor123 |
4 |
584 |
June 24, 2026, 12:55:34 PM
by RRK |
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How Bright Is This Lamp Really? |
DidiusMalloricus |
6 |
706 |
June 25, 2026, 05:26:09 PM
by WorldwideHIDCollectorUSA |
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Unidentified HPS Holophane Style High Mast Offset Light |
Omnilight37 |
4 |
806 |
June 16, 2026, 03:18:50 AM
by Baked bagel 11 |
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Specifications for Korean lamps and ballasts |
WorldwideHIDCollectorUSA |
0 |
868 |
May 04, 2026, 10:30:27 PM
by WorldwideHIDCollectorUSA |
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Interesting Mitsubishi Lighting Technical Document from 1983 |
WorldwideHIDCollectorUSA |
0 |
868 |
May 15, 2026, 12:10:49 AM
by WorldwideHIDCollectorUSA |
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Can you guys tell me what model this CFL is? |
Mem756 |
0 |
894 |
September 01, 2024, 11:54:35 PM
by Mem756 |
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Are Sylvania Relumina really have lanthanum? |
dor123 |
3 |
907 |
May 27, 2026, 07:00:39 AM
by James |
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CFLs and most snowcone LEDs will be banned in 2028 |
Goodlighting2000 |
5 |
927 |
June 21, 2026, 08:01:13 AM
by Lipstickquid |
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Why do metal halide bulbs color shift to different colors at the end of life? |
Lightingeye60 |
1 |
983 |
May 05, 2026, 05:21:49 PM
by RRK |
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1970's/80's Emergency Torches |
Hoff52 |
0 |
984 |
March 06, 2025, 02:35:35 PM
by Hoff52 |
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Would it be possible to make a F40T10 using a xenon fill for preheat/rapidstart? |
F40 |
0 |
1029 |
May 13, 2026, 10:42:55 PM
by F40 |
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What bulb do you prefer? Coated or clear MH lamps? |
Lightingeye60 |
0 |
1099 |
September 12, 2025, 05:33:39 PM
by Lightingeye60 |
