I've never heard of an omni light, and was assuming it was slang for infinite lights.... oh well, I think what bloodsong meant was; take a ball, parent spotlights to it - with the lights touching or overlapping the ball, pointing away from the center. Use as many lights as you think you need, ... as bloodsong pointed out, you could just parent the lights to each other, but the ball will give you an easy handle for when you want to move the whole group around.