And God said, Let there be light: and there was light...

[Buzz]

RAMd®d wrote:
…are the 100W bulbs dimmable?

Yep, at that wattage equiv, gotta go w/ a dimmer...

[Chakravartin]

RAMd®d wrote:
The wattage is the *same* for the bulbs that I've got.

What is the light output in lm for LED vs CFL of the (assumed) same wattage?

They both claim to be 800 lumens.

I just checked the packaging and turns out that I mis-remembered. The LEDs are 11w, but the CFLs are actually 13w. So, the LEDs are slightly more efficient for the same (alleged*) brightness.



*The CFLs look a bit dimmer to me than the LEDs do.

[RAMd®d]

Thanks for the info, guys!

Dimmable is definitely a plus for me.

I will absolutely try one out next week, after checking the color temp.

[Buzz]

Watt for watt LED's seem to have the advantage, but even then, the lumens per watt also seems to vary from mid to high 80's to just over a 100 lumens per watt... efficiency seems to be getting better. Color spectrum and fidelity is the biggest bugaboo, especially w/ the way LED's handle blue. I'm looking forward another year or two when prices are cheaper, and LED's are genuinely closer to halogens as to what the eye sees. Because of the blue handling, or lack of smoothness thereof, my semi-educated guesstimate is that higher watt equiv LED's appear about 10% - 12% cooler than they are rated at, as well as being about 8% - 10% brighter than their CFL counterpart at the same lumen rating (not to be confused w/ equiv watt rating).
==

[Lux Interior]

mrlynn wrote: Got to be helping reduce the heat bill a little.

But at what efficiency? If you replaced the incandescents with a low-heat, low energy consuming bulb (e.g. LED) and had to turn up the heat, would the overall electricity costs be more or less?

[mrlynn]

Lux Interior wrote:
[quote=mrlynn]Got to be helping reduce the heat bill a little.

But at what efficiency? If you replaced the incandescents with a low-heat, low energy consuming bulb (e.g. LED) and had to turn up the heat, would the overall electricity costs be more or less?
Beats me. Not worth the energy to figure out.

/Mr Lynn

[Lew Zealand]

Chakravartin wrote:
[quote=RAMd®d]
The wattage is the *same* for the bulbs that I've got.

What is the light output in lm for LED vs CFL of the (assumed) same wattage?

They both claim to be 800 lumens.

I just checked the packaging and turns out that I mis-remembered. The LEDs are 11w, but the CFLs are actually 13w. So, the LEDs are slightly more efficient for the same (alleged*) brightness.



*The CFLs look a bit dimmer to me than the LEDs do.
The Cree 800 Lumen bulbs are only 9.5W, which is why I bought those. That's a more substantial difference from 13-15W CFLs. Their 100W (1600 lumen) bulbs are 18W, IIRC. There are 20W "100W equivalent" CFLs but they produce less than 1600 lumens.

[davester]

Black wrote:
I'm a little baffled by all the claims that LEDs have inferior light quality to incandescents. Have these people maybe not tried them in a few years?

Exactly. I've read a couple of blind tests where test volunteers preferred some LEDs to incandescents. Here's one of them: http://www.popularmechanics.com/technolo...st#slide-1

Also, unless you hardly ever use a bulb, the energy cost savings on LEDs pays off the capital cost difference long before the warranties on the bulbs run out. Just do the math. Especially if you are using 60 watt equivalent bulbs, there really is no logical reason to continue to use incandescents any more.

[Chakravartin]

davester wrote:
Also, unless you hardly ever use a bulb, the energy cost savings on LEDs pays off the capital cost difference long before the warranties on the bulbs run out. Just do the math. Especially if you are using 60 watt equivalent bulbs, there really is no logical reason to continue to use incandescents any more.

I've done the math.

The bulbs have to last nearly 5 years to cover the cost difference over incandescents.

I'll be lugging these things around to my next two apartments.

[davester]

mrlynn wrote:
[quote=Lux Interior]
[quote=mrlynn]Got to be helping reduce the heat bill a little.

But at what efficiency? If you replaced the incandescents with a low-heat, low energy consuming bulb (e.g. LED) and had to turn up the heat, would the overall electricity costs be more or less?
Beats me. Not worth the energy to figure out.

/Mr Lynn
For most people it isn't hard to figure out. If the heating system uses gas then using incandescent light bulbs is inefficient and expensive. If you use A/C in the summer then having incandescent light bulbs is definitely going to cost you more money than LEDs. If you don't use A/C and your heating is electric and your light bulbs are not located on the ceiling, then it's probably a wash using incandescent vs LEDs.