The 12 Volt regulated power supply that I provide with the Bin Sensor will operate on 95 - 240 VAC at 47 - 63 Hz and draws only 0.2 A as it puts out 12 V DC up to 700 MA. The circuit you cite has your lights and a 1500 watt space heater and as such, you may be very close to the current capacity for the circuit breaker. You didn't say how much load is attributable to your lights, but if you have 2-3 fluorescent fixtures, you may be near the total capacity of a 15 amp breaker (the heater draws 12.5-13 amps and a typical 4 x 32 watt fixture draws about 1 amp) and six fixtures gets you to about 18-19 amps of total load. Since the 12.5 amp heater load comes on at once, you may be creating a voltage drop on the supply, which will impact the power supply if the voltage drops below the lower rated level of 95 VAC (that is what has occured in 2 known cases of this power supply being on a circuit with a 1-2 HP motor). Such a voltage drop may dim the lights briefly and won't impact the heater, but I would not recommend putting this power supply on that circuit. It may work fine, but without some actual data, I would suggest a conservative position. If the heater is on a separate breaker from the lights, then I think you would be fine.
Hope this answers your concern.