I haven't found radiance charts for this exact canopy. Looking at these measurements (https://www.licht-im-terrarium.de/_media/roehre/bec48_exoterra_compact.jpg?cache=) I would expect UVB output comparable to older T8 "Desert" lamps or T5 "Forest" lamps at the distance of 25 cm (but within a smaller area). However, I'm hesitating to recommend it if you don't own a UVB meter.