I respect that you use MH (my closet has a 50 watt MH too) and HPS (i switch balasts come flowering time to a 75watt HPS)
However I still only have 1 cord, all my lights (the CFLs) are tied in series to one plug, no overheats, and if a chandelier can hold 8 65 watt CFLs mine can hold 6 42...