More suited for SEB?

From: Neil (dont_reply_at_bogus.com)
Date: 10/28/04 

Date: Thu, 28 Oct 2004 23:29:30 GMT

Hi guru's

trying to avoid the US election frenzy a long time lurker muses...

I'm fitting a new bathroom, and have the opportunity to fit some 'mood'
lighting.

For this, I propose to modify a shaver light fitting - basically stripping
the 240vac lamp out (I'm in the UK) and replacing with some RGB leds. I want
the colour output and the intensity to be variable 0-100%. Thus the
questions...

Power/Safety: I intend to use a standard 240vac bathroom approved shaver
light fitting, powered from the lighting ring with an RCD in line. Low
voltage circuit for LEDs would be derived via a transformer supply, isolated
from the line. Is there an easier way?

Number of LED's to use?: Don't want it mega bright, but for arguments sake,
say I wanted similar light output to a 100w strip incandescent at max
intensity setting? How many RGB LEDs would I need? Anybody got suggestions
for good LEDs I could purchase in the UK? Obviously best efficiency (i've
got to get that PSU in after all..)

Colour/Intensity
I've written some assembly before, and think I could code a 3 channel PWM to
control each colour in the LED 0-100%. Would this also allow control of
overall intensity, or do I need to add another PWM channel for that? I'm
assuming I can just connect all the individual LED drive circuits in
parallel??

Should I just get some gel filters?

Relevant Pages

  • Re: Light Fair
    ... Like I said, I've sat with a lighting engineer and a high end meter and I know what I saw with my own eyes, so I feel highly confident that the color mixing technology we've developed promises a long term highly efficient lighting source. ... After the competition and before the winners were announced, the LR6 was tested by the CSA and the DOE to ensure that it performed as claimed which it did. ... Usually, I attend the January Dallas Market, not the June Market and that will be the case this year; however, the LED testing issue, at least indirectly, will likely be a hot topic at Market. ... Both DOE and EPA have now issued requirements for Energy Star Fixtures using LEDs and residential/decorative fixture manufacturers prefer the EPA's simpler and less-expensive approach which doe not require full fixture photometry. ...
    (sci.engr.lighting)
  • Re: Light Fair
    ... The only LED data I believe is the data published by the DOE ... I've sat with a lighting engineer and a high ... Fixture Design Competition in 2007. ... issued requirements for Energy Star Fixtures using LEDs and ...
    (sci.engr.lighting)
  • LED breakthrough may revolutionize lighting
    ... the way for low-cost, high-efficiency lighting. ... LEDs are also ... technique to create LEDs on low-cost, metal-coated silicon wafers, ... nitride, which is used in the sapphire-based blue and green LEDs, ...
    (sci.electronics.basics)
  • Re: Strange Science Sideart
    ... the pictures really don't do justice to the lighting. ... The rest of the lighting is leds ... do the vacuum part, it's important to set the mold up about two inches ... I also put williams flipper mechs with bally coils onto it. ...
    (rec.games.pinball)
  • Re: LED breakthrough may revolutionize lighting
    ... the way for low-cost, high-efficiency lighting. ... LEDs are also ... technique to create LEDs on low-cost, metal-coated silicon wafers, ... nitride, which is used in the sapphire-based blue and green LEDs, ...
    (sci.electronics.basics)
Quantcast