Cold air humidifier question

[Ethanwest]

i have a cold air humidifier misting down on top of my cage I have it set to come on every few hours for a hr how often should I have this turned on and for about how long each time

 

[Dragon1516]

for what type of chameleon?

 

[Ethanwest]

Veiled

 

[Dragon1516]

thats fine i would have it come on every couple hours for 30 mins at a time.