Screen filtering UVB? *data found*

[saiyan25]

Hey guys,

I'm going to get a bearded dragon soon, so I am setting everything up, making sure the enclosure's good. I've been seeing the statement 'lid will block 50% of UVB light' a lot, but haven't really seen any data on it. Did anyone measure the difference in the power with a UV meter? If so, can you guys point me to the reference please?

 

[brittani299]

Hello . I don't know of any info saying that but if you think of it the screen will block some of the rays. The will be blocked by the screen. The best place for the UVB is inside the tank so the beardie can get the most of the uvb

 

[jwideman]

Yes, someone did test it, and posted their findings here. While there's variation in the design of screens, the tests showed that there is a significant reduction in UVB even at optimal distance. What's in doubt is how much UVB is enough. If you're using an MVB, enough is probably getting through.

 

[saiyan25]

Thanks for the replies guys. I will take them into consideration, and probably install the UVB light inside.

*Update* 3/18/2013
I found the data here: http://www.uvguide.co.uk/fluorescenttubemeshtests.htm
It looks like the UVB power with the screen is about 70% of the UVB power without the screen (at about 5 inches from the tube).