help please

[morning glory]

hi all,

250w hps 12 hours @ £0.12kwh will cost £0.36 (250w x 12 =3kw x 0.12kwh= 0.36) are my calculations correct????????????please can someone tell me!!!!!
i heard on other posts a 250w actually consumes 450w or something is this true.......i was told 250w is 0.25kwh so im really confused and would really appreciate any help

morning glory

morning glory Reviewed by morning glory on 07-11-2007. help please hi all, 250w hps 12 hours @ £0.12kwh will cost £0.36 (250w x 12 =3kw x 0.12kwh= 0.36) are my calculations correct????????????please can someone tell me!!!!! i heard on other posts a 250w actually consumes 450w or something is this true.......i was told 250w is 0.25kwh so im really confused and would really appreciate any help morning glory Rating: 5

[locomark]

Well my recommendation? Talk to an electrician. But what do I know?

[BoomBoom82]

that is correct but rnt u a thief

[khronik]

Yes, that's £0.36 per day. Incidentally, you brits sure pay a lot for electricity. Here in the states, it's less than half that.

250 watts = 0.25 kilowatts, NOT 0.25 kilowatt hours. big difference. kilowatts are a unit of power, like watts. kilowatt hours are a unit of energy. power is the rate at which energy is used.

Unless you have a really crappy ballast, it probably generates about 50 watts of heat, making your total lamp usage more like 300 watts. This makes the cost more like £0.43 per day.

[the image reaper]

don't sweat the electrical usage, you're burning less than a small TV set ... :smokin: