I grow outside via winter sowing and spring sowing. So it cost me nothing for lights.

I also use recyclable containers so it cost me nothing for those expensive seed trays and heat mats all of that other bogus junk.

I recycle my soil, so I do sometimes have to purchase some soil but I spend very little on that also.

My main expense is the seed!!

I figure 10â per kW hour. My cost is about $2/day. That's for a 600-watt and a 400-watt MH ststem, a 125-watt LED and three 105-watt CFL bulbs running 14 hours a day.

Mike

Your cost per KWH is unbelievably low, better check that again. Al

That's right, those are really cheap rates for electricity. Here in southern California they use a tiered rate system that charges more the more you use. The first 276 KWH is 13 cents a KWH. The next tier is 15 cents a KWH. I expect my 21 tube monster fluorescent light fixture to push me this month into tier 3 where they charge 24 cents a KWH. Tier 4 is 27 cents a KWH and tier 5 is 31 cents a KWH.
We pay more for almost everything in California except food. Regular gas is now $3.59 a gallon, and home and land prices are some of the highest in the country.

I don't even want to think about it. I'm running my lights 12 hours a day. And it's a high sodium pressure lamp so I'm sure I'm going to be a nasty bill. Good thing my husband never sees the electric bill. :)

I just looked at my bill again and I was off a little. I used 949 KWH and my bill was $85.58. Thats the total with tax and all the other clean air stuff they add in. Cost will be wattage x hours run, divided by 1000 x price per kilowatt. So, Its .013 per day if you run it 18 hours a day. So about a nickel for every seven hours of run time.