Topic

Ferguson Zones

4 guides.

Heat & UVBOct 12, 20263 min

Reptile Temperature and UVB Chart: Basking, Day and Night Temps for 59 Species

A searchable chart of 59 lizards, snakes, tortoises and turtles: basking surface, daytime and night temperatures, UVB zone and, where Merck covers them, humidity and diet.

Heat & UVBOct 9, 202611 min

Best UVB Lights for Reptiles of 2026, Matched to Ferguson Zones

T5 UVB kits for bearded dragons, skinks, ball pythons and leopard geckos, chosen on the makers' own UV index charts.

Heat & UVBOct 9, 20268 min

Reptile UVB and Ferguson Zones Explained: How Much UVB Your Reptile Needs

The four Ferguson zones, which zone your reptile is in, and how to turn that into a lamp and a distance.

Heat & UVBOct 9, 20266 min

T5 vs T8 UVB Lamps for Reptiles: Which Should You Buy?

On the makers' charts a T5 HO tube gives two to three times the UV index of a T8. Here is when each one makes sense.

Ferguson Zones

Guides

Reptile Temperature and UVB Chart: Basking, Day and Night Temps for 59 Species

Best UVB Lights for Reptiles of 2026, Matched to Ferguson Zones

Reptile UVB and Ferguson Zones Explained: How Much UVB Your Reptile Needs

T5 vs T8 UVB Lamps for Reptiles: Which Should You Buy?