I am looking for owners experience with the Highlife line in trying to understand what the increase will be in KWH / month consumed by the hottub. We all have different supply rates from our electric companies so to say the hottub will cost an additional $50 / month is really climate and rate sensitive. My supply rate is on the low side at 6 cents per KWH but I am looking to see what the additional KWH consumption is on your electric bill each month. Is it 500 kWh or 1000 kWh ? I appreciate your help in trying to understand the energy consumption.