yes, inside a fiberglass screen under the eaves of the house (so not full sun) it was 5 i think. Inside glass even if in the window the blazing hot sunny car it was 0. All glass uvb 0. uvb lamps have special filters to let the uvb out.
So if they're on my porch, I could expect 5 or less.
Do you know how much UVB they are supposed to get?