Hmmmm...well currently each tank has it's own dimmer/rheostat because they're all in different areas of the house, except the corns share a shelving unit. Would it be too much to plug each dimmer into a power strip when we put the whole lot of them into a rack?? Hmmmm...this poses another question to myself...I think each dimmer switch has room for only one plug. Any suggestions from anybody would be great...just trying to keep this project simple & able to use what we have on hand as much as possible.