so... is that like how many watts per hour it uses or something?

[So]

I'm pretty bad with electricity myself, I can't keep amps, voltage, wattage, cycles/second and all that shit straight.

I do know, however, that I get charged for 'kilowatt-hours' so I think of kilowatt as a flow rate that you would multiply by time to arrive at total energy quantification.

You got it. Not that hard.

 

[Rubycon]

Getting past the point of diminishing return though. If that much light is needed one is better served with metal halide HID.

Care to guess?