And electricians out there

Here goes. We live out in the sticks. The breaker box at the meter pole feeds our well system with a 60 amp breaker, this feeds a jet pump with pressure and in turn feeds a pump with a pressure switch, that sends water from a 4 gal holding tank, all 220 amp stuff.
I need to put a breaker box at the well house, and feed a line to the shed for 4, 125 watt heat lamps.
Question is what do I need at the well house for breakers for the heat lamps?
I figure I need to change out the 60 amp breaker at the main box at the pole to 100 amp , place a 60 amp breaker the at the box at the well house for the well system, and then run 1 or maybe 2 lines to the shed to feed the heat lamps. I would have 40 amps to use for breakers to the heat lamps. Two lamps per one wire feed by a 20 amp breaker??
The distance from the well house to the shed is about 60 feet or so. When in use, all 4 heat lamps could be going at the same time.
My description is probably clear as mud!