They are for budding.

I'm still trying to figure out how to mount them... I was able to solder 16 of the bulbs so that they hang individually and connected them to one heavy duty 660 watt plug in, but it took a long time to do that.

I want to make some kind of box to hold 5 bulbs at a time, any ideas?

Im too cheap to buy ceramic sockets, but it would make it much more simple...