halides.......finally!

[rickjames]

If the bulb is a true HQI bulb (double ended) then it must be shielded as the high quartz glass casing of the bulb lets a crazy amount of UV's out, enough to harm most living things. Plus the UV's can cause damage to your eyes, like a welder.

[adidas]

Originally Posted by rickjames

If the bulb is a true HQI bulb (double ended) then it must be shielded as the high quartz glass casing of the bulb lets a crazy amount of UV's out, enough to harm most living things. Plus the UV's can cause damage to your eyes, like a welder.

SE bulbs are ok tho right?....dont want skin cancer or someting

[OCDP]

It's most definitely an HQI (double ended) Ushio 20k bulb.

The floodlamp has a sheet of glass covering it, so the bulb is not exposed.

Will the piece of glass suffice?

[rickjames]

Yeah. Single ended bulbs are made glass that filters out most UV rays.

[OCDP]

So your saying the sheet of glass covering my DE bulb will be good?

Sorry, so new to halides.. so much more complex than I ever would have imagined.

[rickjames]

I am saying that if you have a DE bulb you will absolutely need a UV shield. The pendants usually come with them.

EDIT: seen your other post OCDP, sounds like you are setup ok.

[OCDP]

cool

thanks a lot guys

[Invigor]

yes glass will be fine.

[StirCrazy]

Ok few things, a few tests have shown the UV output is not as bad from a DE bulb as we though, it is slightly higher but it is not going to cause skin cancer for the amount we are in there. yes glass as thin as 1/16" of an inch will take care of this.

is it good for the corals to filter out this UV, well this is debatable, UV will cause the corals to release pigments which help "color" the corals, but to much of the wrong type could cause tissue damage. so how do we go about regulating this. well glass will remove all of the "harmful" UV rays (can't remember the names either UVa, UVb or UVc) and will reduce the ones we want so the trick would be to figure out a way to measure the ones we want and vary your UV shield thickness to allow how much UV we wan t through.

Oh and where are the pics

Steve

[shotzee]

Is that the halide from Chris? If it is it was originally mine. Its made from a halogen fixture so the glass will protect from UV because the halogen lights that would normally be in them also emit UV. That's the reason I chose to use these fixtures when doind my DIY. I did the same thing with my DIY 250W DE halide set-up I have now and it works great.