Am 31.07.2014 15:16, schrieb Francois Labreque:

>> LEDs sound like a nice idea, but the light they produce is usually very
>> directional, and they're not really bright enough. You'd need to coat
>> your whole ceiling with them.
>
> I don't get this.  Here, we have warnings that LEDs are too bright and
> can actually injure your eyes if you look directly at them.

That's probably because the light comes from a very small spot, so you 
can easily focus all of the light energy on a very small region of your 
retina.

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