Which Exo terra must I use for each cage? repti 100, 150 or 200?
Answer: The 100 is equal to the old 2.0, the 150 is equal to the old 5.0 and the 200 is equal to the old 10.0. Only the 200 is currently available in SA, all the old UVB bulbs are still available. For your lizards I would use the old 10.0 or the new 200 rating. By the UVB is stronger, I mean the quality of quantity of UVB light is better not the amount of heat.
secondly, If I place a high output light in the cage and the lizards don't require that much UV, Will they move away from the light seeing that the light only penetrates up to 50cm or will they just sit there and burn?
Compact UVB lamps do not give off heat and your lizard cannot overheat if it sits under the lamp. To avoid contact burns prevent the lizard from physical touching the bulb.I have used high output UVB lamps at distances of only 30cm with no harmful effects.
So basically use the old 10.0 UVB or the new 200 UVB