Sun Pool Products Sunlight-Activated Programmable Timer - 20 Amp Twist Lock Your filtration equipment can now be triggered by sunlight or darkness. This time is very easy to program, and will allow you to save energy with the multiple setting options. Settings can be set for 2, 4, 6, 8 or 24 hour running cycles, triggered by either day and night. Includes a 20 amp twist lock plug. Only works with pumps measuring up to 20 amps