The local Shoprite supermarkets here in NJ have been
selling Philips 65W LED 6" recessed ceiling conversion
kits for $10 for a couple months now. That's the whole
replacement trim piece, together with an adapter that
screws into the socket of the old fixture. They look
great, nice warm light too. At first, I thought they
would only be on sale for a week or two. But it's been
a couple months now and they just dropped them to $9.
Two years ago, similar were $50 at HD. I think they
are still selling for more like $25 or $30 there.
Found this nice comparison chart:
Use half the energy of cfl's. I had thought they were equivalent.
I'd like to see some 75 watt lumen equivalent bulbs.
When I replaced 60 watt incandescent I went to 75 cfl's.
Nice to have extra light for older eyes.
Think Walmart has ~$5 apiece GE led's. Would be nice to see how they
compare with Phillips. Bad side effects, I've seen with cfl's are color
On Wednesday, April 22, 2015 at 12:27:53 PM UTC-4, Frank wrote:
When LEDs first came out they had the same efficiency as incandescents, 19 luments per watt, compared to the 60 of a fluorescent.
That chart claims 100 lumens per watt, which seems optimistic to me. But they have greatly improved over the first versions.
I would guess LEDs are now equivalent to tube fluorescents, and superior to CFLs.
I have yet to have an LED bulb burn out. Flashlight versions sure, they degrade easily especially if you run them on high power.
But I also don't believe 50,000 hours of life. Probably the LED itself can do that, but there's a heck of a lot of electronics feeding it.
Has anybody measured power factor on an LED yet?
Power factor is beyond me:
I worry about electronics too. Found that cfl's don't last much longer
than incandescents in my bathrooms. Switching them on and off for brief
periods is apparently hard on the electronics and they go first.
I look at circuit diagrams for cfl's and led's and they look as complex
as my first computer. A failure in them, it does not matter how long
led itself lasts.
I had the simplest of the led flashlights which came with a headlamp I
bought. LED bulb with battery encased in plastic where squeezing the
plastic sides caused filament contact and light came on and went off
when pressure released. Contacts failed and light was kaput.
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