I don't see the difference. Lowers wattage closer, higher wattage farther. Temp and humidity are the same. The bulbs don't dry the air as you infer. If they did where would the water vapor go? If you increase the temperature of air you decrease relitive humidity, unless you are supplying additional moisture some how.



I can't speak for other herps. But, from my experience and observations with dragons, they will not bask at anywhere near that high a temp. In other words if I were to use a spot light to make a 130 degree basking spot, my dragons would not sit in the light but would sit far enough away to get the 105 or so they are comfortable with.



Also it is important that there be a good temperature gradient in a dragon's enviroment. In enclosed enclosures it seems unlikely you could have a basking spot of 130 and a cool side with a temp of no more than 85. The only thing I can think of is maybe if you are using a cattle trough or something that is completely open. If that is the case a low wattage bulb close up would not provide the proper background temp.



Maybe you can explain your setup better and what reptiles you are housing.

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