"You lab rats can do me an experiment. By measuring the power usage of each of the grows (kWh) just the grows, no other stuff, and plot it against harvested dried weight. My experience says the big dog wins. Love for you to prove me wrong and save me some money. Throw in amortized equipment cost too."

We pay > 40 cents per Kwh. here.
Believe me, I've done the math.

It would be much less expensive to pay street dealer prices, than to grow indoors here with HPS or MH.

Since I'm legal, I get to use sunlight for flowering, and a measly 100 Watts for Vegging.
LEDs are very efficient and 100 Watts is plenty for my plant limits.

The lights were expensive to build, but amortize over 50,000 hours, and there is no bulb replacement cost.
So, they amortize to 4.8 cents per month.

They run about $20 per month for electricity at our present rate.
The fans and air pumps are less than $5 per month.
I do not charge for a labor of love, so plant care gets called a hobby.

So, even if I amortize the greenhouse cost and factor the coco, ferts, PH down, grow bags and misc. expenses,
I pay about 1/10 of the street prices for my medication.

Good thing too!
My antisocial insecurity barely keeps me fed and dry.

Aloha,
Lab rat.
Er, I mean, Lab 'zard