Hey Lex,
Lowes has 65 watt 2700K bulbs that fit a regular socket. $16.00 roughly but for my small grow space, two of these on a splitter and five 42 watters gives me 340 watts in a 16" x 36 x 42 space. I am trying the big wattage to see if I get better penetration from above and side lighting with 42s. I also have two mogul bases wired up in there but just use the 60 watt 6500K. I also bought two of the 125K mogul base bulbs but the bases I bought wont kick on the higher wattage. No sweat really, the correct base with reflector costs the same as the bulb, about thirty bucks. My current rig will be used for veg and mothers while a new flower space is in the works for winter.
By that time my fourth bag seed butchery/ dial in will be complete and maybe I will pay for some genetics.