Iridescence vs light

I'm going to buy a Herptek cage and a retic in the near future.

What kind of light do you guys use for a display cage?

I have seen some cages at a reptile expo with almost blue light.
The retics looked awesome in this light, so I would like know how you think about lighting of display cages..

You can play around with different type of lights to see what you like best.
I like using 2.0 UV and/or GEs Plant /aquarium flouresesnt tubes for my daytime lighting. Right now I don't have any night lighting, though I plan on and have used reptile night lights, most of these are fine for 24 hour use.
But there are so many flourent and incadsent lighting options.