Firstly Splosh

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Ok, lightscreens - bulbs, gels etc.
My only reservations about using gels on lightscreen bulbs would be down to the heat and closeness (is that a word?) of the gels to the bulbs - what sort of wattage bulbs are they? Pygmys would be 15watt, golfballs are 40watts (the bulbs, not the spheres that you play golf with - before anyone mentions it?), ordinary lightbulbs....well, anything from 25watt to 150watt++ If they're reflector shaped then most definately dont try to filter then either.
I'm using light screens to make the disco a focal point in the room - a feature sadly lacking in the clones of "8 black boxes 'anging on a pole". I use 40watt golfball bulbs (plain colourless clear bulbs) but.... I spray them with car paint.
This is fine, as my lightscreens are the type with prismatic perspex between the bulbs and the audience - easy to do too. If the bulbs are visibly exposed to the audience, then dont try this, unless you're really neat at spraying.
Get yourself 1 x large cardboard box - poke a few holes into one side to rest the necks of the bulbs into, and spray away... alternatively, in the abscence of a cardboard box - you can prop the lightbulbs up in the neck of a (empty) milk bottle, or similar to spray.
Leave them for a good hour to dry and - hey presto - coloured bulbs.
Once again,

welcome to DJs United.