I'm not sure if there is a large difference in heat given off between a 110W VHO and a 55W PC. I lean towards the VHO giving off more heat, but that is my opinion from put my hand on both.
I wasn't sure if there was a 48" PC but I know there was a 48" VHO. So either way, I'm just curious about the difference between the higher wattage bulbs.