[sphelps]

Originally Posted by scuglass

This is why I ask.
http://www.reefland.com/forum/lighti...shielding.html
http://www.aquarium-design.com/reef/uvlighting.html

From hellolights

There has been tonnnnns of discussion but no one seems to have answers....

Are the shields on the halogen lamps uv protected?

Like I said "Low E" (low-emissivity) glass, it filters the most UV with it's special coating. It's not expensive and all glass shops will have it, if you don't want to spring for the tempering just go up to 5mm and you should be fine.

Otherwise use SE bulbs.