Just how bright are they?

[Ed]

I've seen lots of info here and there
on brightness of the new generation LEDS.
I have read that they are brighter than
standard incandesant globes.
I have also read they are not as bright as
halogen or krypton.
I'm confused about this.
Do they compare one led to one halogen globe?
do they take burn time into account?
Or let me rephrase the question....
How many Luxeon Stars would it take to match the brightness of a 3v halogen flashlight??
Stepping up the voltage from 2 D cells could
power more than one LS.
What the hey, why not use the Luxeon ring?
It has 6 emitters on it. That could grow
your indoor plants!
Does anyone know how long this could theoreticaly burn for on 2 D cells?
If I went to all that trouble would it even be close to the 3v halogen?

cheers, Ed

 

[JollyRoger]

As it is, even just one luxeon is pretty close in brightness to a 3V "standard" flashlight bulb...depending on how hard you drive it. My ARC LS is very comparable to a minimag...which runs on...3V! And the color of the light is far superior. I think 2 or more luxeons would definitely outdo a 3V halogen bulb.
The luxeon ring? Well, that is some serious lighting power!