Incandescent lights

js at js at
Fri Feb 6 10:15:05 CST 2015

On 2/5/2015 9:04 PM, Jon Elson wrote:
> On 02/05/2015 03:14 PM, Tothwolf wrote:
>> I don't have links to all the 
>> relevant documents handy, but 100W, 
>> 75W, 60W and 40W are all banned from 
>> import or manufacture in the US 
>> (rough service bulbs are exempt...for 
>> now at least). Stores are allowed to 
>> sell off existing stocks and 
>> inventory, and many chains stocked up 
>> heavily before the second half 
>> (60W/40W) of the light bulb ban took 
>> effect.
> I have VERY few incandescents here.  I 
> have started converting our kitchen
> (where the lights are on a LOT of the 
> day) to LED.  I couldn't find anything
> I liked (some LED fixtures are 
> actually on recall as a fire hazard) so I
> built my own.  I made a 10 LED fixture 
> with Cree 1W LEDs first for our
> pantry/laundry room, which had the 
> worst lighting in the house.  (A recessed
> fixture too cramped to fit a CFL, and 
> made so it lit a spot on the floor and
> not the room.)  I built my own 
> constant current source for it, and it 
> was
> a huge success.  So, then I built two 
> retrofits for dual 48" fluorescent tubes.
> These have a string of 20 1 W Cree 
> LEDs and a commercial LED lighting
> power supply.  The old magnetic 
> ballast drew 103 W, the new LED system
> shows 21 W, and the lights actually 
> appear brighter than the fluorescents.

Very interesting -- how did you build a 
retrofit for a 48" T12?

- J.

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