A broad spectrum daylight basking spot lamp. The spectrum is ideal for plants photosynthesis & the UVA (ultraviolet A) light contributes to reptiles physiological well-being. The spot allows one to direct the heat & light in a certain direction to create general basking sites in the terrarium. Can be combined with Night Glo or Heat Glo for a 24-hour cycle. The R20 version is available in 50w, 75w (shown), 100w & 150w.