vivarium light and humidity question

[leigha]

Hi Guys
I had previously posted a thread askign for help with my new 20 gallon vivarium thank you for all the responses and help)...now it has been a couple weeks since the set up, I have a coup,e more questions...
1. light: I am curently using a fish tank canopy - 2, 24" T5 bulbs (not sure the K rating - I suspect between 5 and 6K). They seem to be emitting enough light, my Brassia has now developed a slight "tan". Are 2 T5 bulbs enough or 2 more will be better..I also have seen T5's rated at
10 000K!! Mimic for sunlight - will these burn my plants if I decide to replace the ones I have?

2. Humidity: I currently maintain daytime humidity between 50 to 60% - (small computer fan circulating air). Is this high enough? Was thinking to add humidifier to direct mist into the viv. Or do I ven need this? My mounted orchids do dry out quite quickly (within the day)

any input greatly appreciated!!
thanks so much