- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
I have installed an LED bulb into a hallway fixture controlled by two 3 way switches, both illuminated, meaning the switches glow orange from an internal neon lamp when both are off. this was working fine with the CFL I removed, but as per usual, the CFL took too long to get to full brightness and the user complained. So I put in the LED bulb because although the delay is sometimes perceptible I've had success with people being happier with the light output being bright immediately.
But I got a call back because sometimes, not always, the LED flashes AFTER its been turned off! Not just once, it continues flashing about once every 20 seconds or so. The first time I looked at it, the flashing went on for about a minute then quit, but then again later, it kept on for 20 minutes until I took it out and replaced it with the CFL again. I put it somewhere else and it works fine, I put it in another 3 way hall fixture, without illuminated switches, it works fine. I put it back into the original spot, it flashes again.
I don't do a lot of resi work any more, but I am the one who wired this up (traded Sheetrock work with a friend) so I know I wired it right and like I said it has worked fine for years with an incandescent and a CFL. Anyone else noticed this phenomenon with LED lamps?
But I got a call back because sometimes, not always, the LED flashes AFTER its been turned off! Not just once, it continues flashing about once every 20 seconds or so. The first time I looked at it, the flashing went on for about a minute then quit, but then again later, it kept on for 20 minutes until I took it out and replaced it with the CFL again. I put it somewhere else and it works fine, I put it in another 3 way hall fixture, without illuminated switches, it works fine. I put it back into the original spot, it flashes again.
I don't do a lot of resi work any more, but I am the one who wired this up (traded Sheetrock work with a friend) so I know I wired it right and like I said it has worked fine for years with an incandescent and a CFL. Anyone else noticed this phenomenon with LED lamps?