[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [APD] How much light actually gets down here?

Brilliant!  This lets us kill two..ah..fish with one light?   The old  
magnifying glass and sun trick.

On May 3, 2007, at 11:03 AM, S. Hieber wrote:

> Hmm. Perfect parabolic puts light where we want it? WEll here's a  
> jumping off point. Sometimes we want a very tightly focused "spot"  
> of light (e.g, when working non small electronic circuits) but  
> probably rarely and surely not often. Even over an 30 gallon  
> aquarium a two or three inch wide swath of light running the length  
> of the tank would be of rather limited utility -- well, you'd have  
> some weird aquascapes, anyway. In fact a few of us have been known  
> to flex an AHS reflector outward on some tanks to increase the  
> spread of the light. I've done the narrow swath kind of things,  
> sort of, using very narrowly focused LEDs but the effect is, well,  
> disappointing is the best that can be said for it.
> Image a car headlight that shown a nonspreading column of light  
> only a few inches in diameter -- why, we'd kill even more folks on  
> the road than we do now. Which, I guess, brings us around to the  
> killin' subject again.
> sh
> -
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com