REPTI HOME T8 UVB Reptile Light 15W 10.0 2Pack, 15w Uvb 2pack on July 15, 2026 July 15, 2026 Answer:5.0 indicates that 5% of the transmitted light is UVB. uvb 5.0 bulbs provide safe and stable UVB(5%) and UVA output. No harmful UVC uvb fluorescent lamp doesn’t hurt the reptile’s eyes or burn the skin.