My PC light system that is over my refugium went out over the weekend. I was reading in another area of the site that I could just use a clip on lamp with a regular bulb. What watt bulb do I need? Keep in mind that I have grape calerpa in my refuge. Will this same lighting work for grape calerpa? Is this just a standard clip on light? I`m starting to think I really dont need all that high powered PC over the refuge. Any help sure would be appreciated.