[Ozric Jonathan]

I agree with Rach.

It's a shame the solarmeter is so expensive because unless you don't bother with uvb lighting at all it is incredibly useful to have one.

I use mine when setting up a uvb source, when checking to see if the uvb source is still working and if so how effectively, and I use it outside to get an idea what is going on with natural uvb. It's a very useful gadget unless you just ignore the issue of uvb altogether.