#### BobTheOwl

##### Tele-Meister
If he won’t pay smash his bulbs and bin his crop. Then kick him out. He’ll get the message not to take the p155.

#### Archtops

##### Tele-Holic
First and foremost he needs to pay his usage share. Secondly, I would not feel safe living there with that going on.
Whatever “that” is.

#### Archtops

##### Tele-Holic
The grower is ticked off because he has to pay his fair share? He is a user of others not just electricity.
Time for a new residence where the neighbors have others best interest at heart.
Best of luck!

#### Tonetele

##### Poster Extraordinaire
ctually, 600 watt globes use 600 watts.

Obviously but in a grow house long term lighting is used. That's 600 Watts times how long?. That can lead to lots of wattage used.

#### Rich_S

##### Poster Extraordinaire
Silver Supporter
No, in reality a 600 watt device uses 600 watts. Period. Watts is a measure of power.

If you leave a 600 watt lamp on for 1,000 hours, it will consume 600 kilowatt-hours of energy. Power is instantaneous, but electric companies charge you for how much energy you consume, i.e. how much power you draw for how long. Residential electric bills don’t say anything about watts, they are priced in terms of cents per kilowatt-hour.

Getting back to the OP’s problem, the calculation is fairly simple. Add up the total wattage of all the grow lights, multiply by the number of hours per day and the number of days in the month. This will tell them the number of watt-hours his entrepreneurial roommate consumed. Divide by 1,000 to get kilowatt-hours, and look on the monthly bill to see how much the electric company charges per Kw-Hr. Make farmer-dude pay that much off the top, then divide the rest evenly among all the roommates.

Of course, having such an organized financial arrangement might make the authorities think they were all in on it, if/when those authorities come a-knocking’.