UVB Question

Hey all I got an arcadia shade dweller pro T5 7% UVB light. I also got calcium WITHOUT D3 because of this.

However my boy spends literally all day when the light is on his moist or hot hide. He does not see the enclosure during the day, thus how is the light even reaching him??

Should I switch to calcium with D3 under the assumption he’s not absorbing any of that good UVB light??