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Re: Confused about UVB! (long)

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Posted by Chris_Harper2 on August 09, 2002 at 14:48:15:

In Reply to: Confused about UVB! (long) posted by Mic on August 07, 2002 at 09:54:28:


::I have always known that UVB is necessary for almost all diurnal reptiles.

Actually, it's not clear that UVB is "necessary" for any reptile.

:: Would it be safe to say that a small (18") florescent bulb of low wattage and relativly high UVB output (i.e.5%) would be equal to or less efficient than a larger (24-36") florescent bulb of higher wattage and lower UVB output (i.e.2%)?

With your example the smaller bulb would produce more effective UVB. Wattage increases logarithmically so a 100 watt bulb, for example, is not twice as bright as a 50 watt bulb.

::All this time I've been under the impression that a higher UV output was best no matter what the wattage of the bulb. Any thoughts?

This is probably not true as very few of the studies have teased apart the independent effects of light intensity vs. UV output. In fact anecdotal evidence suggests that light intensity is very important.




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