It's a shocking amount of money to run a crop on Natural Gas. We had a 6 lighter going in an area where we lost electric power a lot, and looked at the cost, and it was like $6,000 A CROP, (9 weeks) for the natural gas, PLUS THE COST OF THE GENNIE, LIKE $5,000 plus an HVAC guy to run the gas connection, vs maybe $800-$900 for a simple electric bill over 9 wks... It's about 45 bucks a month, per light where we are at... maybe in Cali it might be a better option, given their electric is more expensive.