Is 65 watt on a PC the output equivalent or the actual power consumption? I have not researched it but always assumed it was the output equiv. I suppose you could be right and it is the actual consumption. I know the PC bulb on my fuge is rated at a 75 but uses 19w or something like that. I am sure there is a difference but like I said I have not put the research into it that you must have. Regardless, the minor increase in electric cost is worth it for the enjoyment I get out of my little slice of the ocean.