Is there more UVB that passes through plexi than it does glass.? It's not as transparent so I figure less should be reflected. You light meter owners have you ever done readings on the amounts that pass through glass and plexi?

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Mike
"Never worry about numbers. Help one person at a time, and always start with the person nearest you." - Mother Teresa

Depends on the thickness of glass and type/composition compared to the thickness and type/composition of plexi.

If your looking to get any decent amount of UV through something look into solacryl. It's expensive but worth the money.

I've tried to find out where I can get some, but no luck. Do you know who sells it?

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Mike
"Never worry about numbers. Help one person at a time, and always start with the person nearest you." - Mother Teresa

Good luck!!

Hmm Considering uvb is filtered out a LOT by glass I wouldn't say it's much better.

Call a local glass cutter, a home improvement shop wont have stuff like this.

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Check suppliers for Greenhouses.
Its a greenhouse glass.

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Merlin,
What's Life Without A Little Magic!

Joeking it actually is much better. From what I've read recently on it. It is used extensively in zoos. I'll definitely check the glass specialist shops.

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Mike
"Never worry about numbers. Help one person at a time, and always start with the person nearest you." - Mother Teresa

Oh. I just realized you were talking about the plexi. Yeah it's not great.

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Mike
"Never worry about numbers. Help one person at a time, and always start with the person nearest you." - Mother Teresa

http://www.spartech.com/polycast/solacryl.html

It is almost only available in full sheets and shipped freight (not cheap). Try posting on HH and see if someone will split a sheet with you.

Maybe ebay.