Subject Started by Replies Views Last post
why this for? valirex 3 1172 December 22, 2018, 01:39:37 AM
by Medved
Why the ignition mothed of LPS lamps is different then of the fluorescents dor123 5 1209 January 18, 2011, 04:54:36 AM
by AngryHorse
Why the British 125W T12 requires a capacitor for optimal lamp performance? dor123 4 289 June 20, 2022, 05:32:36 AM
by AngryHorse
Why tandem fluorescent fixtures, are only used in the US? « 1 2 » dor123 16 3478 August 09, 2018, 10:12:02 PM
by Lightingguy1994
Why starters tend to black after many startups ? Jovan 7 1229 November 08, 2019, 06:53:46 PM
by Ash
Why so few external starter preheat CFL fixtures in North America? WorldwideHIDCollectorUSA 0 38 August 07, 2022, 11:05:02 PM
by WorldwideHIDCollectorUSA
Why plastic reflector? osramlight_200 8 1104 June 12, 2021, 12:03:46 PM
by Krep
Why not more POWR/DOOR or PowerPad fixtures M250R201SA 8 1000 June 30, 2016, 10:23:58 AM
by streetlight98
Why it is common to use electronic ballasts in horticulture lighting? dor123 12 1727 January 26, 2018, 10:47:33 PM
by Lodge
Why electronic HID ballasts can't accelerate the run-up of HPS lamps? dor123 3 200 June 28, 2022, 07:26:31 PM
by 108CAM
Why doesn't my light come on when the street lights do? « 1 2 » gramirez2012 15 3322 December 17, 2010, 01:41:17 AM
by Medved
Why doesn't GE offer the 201SA in Metal Halide? M250R201SA 8 1220 May 06, 2016, 05:28:35 PM
by Ash
Why does the 40W magnet ballast can't light two tubes? bulb_tester2009 6 591 February 09, 2022, 11:01:05 AM
by AngryHorse
Why does everyone hate the Durastar? M250R201SA 10 1118 May 27, 2016, 05:39:37 PM
by M250R201SA
Why do Duke Energy replace some fixture with LED but usually HPS Cole D. 2 888 December 30, 2018, 06:54:13 PM
by wattMaster
Why do DOT replace FCO fixtures with drop lens for spot replacement. Cole D. 1 867 October 30, 2018, 11:58:16 PM
by wide-lite 1000
Why did they even bother with 50-65% output residential ballasts? Luminaire 9 1638 April 23, 2011, 01:08:35 PM
by Medved
Why did New York City, USA use electronically ballasted S56 HPS Street lanterns? WorldwideHIDCollectorUSA 13 1369 November 17, 2020, 10:37:12 PM
by Lumex120
Why calling the color of failed LED streetlighting "purple" is minsomer dor123 7 370 July 21, 2022, 06:50:39 PM
by xelareverse
Why american ignitors, are specified with specific ballasts? dor123 2 604 March 30, 2017, 10:18:30 AM
by dor123
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