halide question

[fencer]

Aside from burning your retinas out. Can trigger all sorts of nasty skin problems...the C word comes to mind.

[Jason McK]

Originally Posted by PoonTang

Mogul base bulbs do produce UV but the glass envelope of the bulb is the shield. A mogul bulb is nothing but a HQI bulb with a built on UV shield.
ALL HQI bulbs MUST use a separate UV shield.

Exactly

J

[Doug]

http://www.masla.com/reef/uvlighting.html

Perhaps read this article. SE bulbs still produce a lot of UV light.

[bv_reefer]

good thread just finished it, darn they didn't have the xm's just coralifes they used for the experiments.

[bv_reefer]

so what should use to cover the top of my tank then? eggcrate?

[Jason McK]

Interesting artical Doug. Odd that more action is not taken to combate SE UV.

J

[Sebae again]

And yet I was reading an article in a magazine several months ago that using UV emiting bulbs may be the next frontier of reef keeping . I.E. the acros that are near the waters surface or even exposed during low tide and the relationship of the sun's effects.

[Ya Dude]

we should just move our tanks outside.Its the natural thing to do

[Doug]

Originally Posted by Jason McK

Interesting artical Doug. Odd that more action is not taken to combate SE UV.

J

Yes, I always thought it was. It came to mind when I seen you guys discussing uv, so had to go find it again. I have ran both ways. Like most, with no glass, using SE bulbs but I also ran my PFO pendants with the uv glass in and liked them that way also. I dont know what was loss in output, as I never measured.

[PoonTang]

Originally Posted by Ya Dude

what problems does the UV cause,I know the sun produces UV and I dont hear the ocean complaining

The UV will kill anything that is under the light. Fish will eventually be blinded not to mention the harm to you. Think about it...you can sterilize tank water with a 9W UV sterilizer, think what a 400W bulb will do to a tank. Also, just some regular old piece of glass wont do.