As long as they are really spectrum lights and not party bulb type lights, it will be fine. A good way to check whether a bulb you've purchased or have on hand is visible to them is to turn it on as the only light in a dark room next to or above the cage, and see if your cresties pupils are dilated or slitted. If they're dilated, the light should not bother it in the least. Party bulbs are just tinted, though, and not actually in the proper spectrum.