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Effects of external heating on tubular high pressure sodium lamp. |
HomeBrewLamps |
4 |
703 |
February 01, 2026, 05:07:26 PM
by James |
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Lamp electrodes with thorium oxide or lanthanum oxide? |
Multisubject |
2 |
631 |
February 01, 2026, 04:55:05 PM
by James |
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Hall of shame - show your *worst* lamps and fixtures |
Laurens |
10 |
1647 |
February 01, 2026, 04:49:12 PM
by wide-lite 1000 |
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What is negative CRI? |
Multisubject |
4 |
788 |
February 01, 2026, 11:24:03 AM
by dor123 |
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CFLs are no longer available? |
bulb_tester2009 |
13 |
1620 |
February 01, 2026, 11:22:38 AM
by dor123 |
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Questions about the modern use of quartz in lamps |
Multisubject |
8 |
1546 |
February 01, 2026, 11:01:18 AM
by Multisubject |
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What are your lighting pet peeve? « 1 2 3 ... 6 » |
JECWhiz |
85 |
68203 |
January 27, 2026, 04:27:18 PM
by WorldwideHIDCollectorUSA |
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Integral-Starter Preheat Ballasts |
Multisubject |
9 |
1317 |
January 27, 2026, 03:52:14 PM
by Ash |
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European Semiparallel Ignitors? |
Multisubject |
9 |
1036 |
January 23, 2026, 01:03:36 PM
by Ash |
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I found a Unicode character that looks like a post top. |
lightsofpahrump |
3 |
584 |
January 19, 2026, 05:46:52 AM
by dor123 |
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"E" Shape vs "ED" Shape Envelopes? « 1 2 » |
Multisubject |
15 |
1498 |
January 18, 2026, 02:16:06 PM
by Ash |
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More Lamp Calculations Stuff |
Multisubject |
9 |
887 |
January 18, 2026, 02:06:44 PM
by Ash |
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Unintentional Fluorescent Tube Cannon |
Multisubject |
9 |
842 |
January 17, 2026, 07:18:34 PM
by Ash |
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Definition of HID Lamps |
Multisubject |
8 |
687 |
January 17, 2026, 07:08:34 PM
by Ash |
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T10 Fluorescent Lamps |
Multisubject |
6 |
637 |
January 14, 2026, 05:31:04 PM
by WorldwideHIDCollectorUSA |
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T12 Retrofit Lamp Questions |
Multisubject |
10 |
1018 |
January 14, 2026, 05:16:35 PM
by WorldwideHIDCollectorUSA |
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Operating/Dimming large halogen lamps on 14VDC « 1 2 3 4 » |
HomeBrewLamps |
51 |
19657 |
January 14, 2026, 01:56:33 PM
by HomeBrewLamps |
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Need Help Making a Decision |
NeXe Lights |
4 |
687 |
January 13, 2026, 10:16:37 PM
by NeXe Lights |
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EOL Stories |
suzukir122 |
7 |
851 |
January 08, 2026, 09:26:02 PM
by suzukir122 |
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What kind of camera(s) do you use for your lighting-pictures? « 1 2 3 ... 7 » |
Prismatic |
91 |
35884 |
January 08, 2026, 08:05:31 PM
by bulb_tester2009 |
