I live off grid with a one panel (30.1 v 235w) four 12v battery bank (wired for 24v), 12/24v charge controller and a 24 volt/900w inverter.

I bought some 6v led push lights from Walmart so I wouldn't have to use my standard 110 lights to save power. It didn't take long for me to realize the cost if batteries would be outrageous, so I cut the end off of some 6v DC adapters and wired them directly to the positive and negative terminals in the light. I plug them in and they work great!

I'm thinking, well heck, I can set up a few of these around the cabin and still not draw near half of what one 110v 40w bulb would.

I just want to verify what I am thinking regarding the volts/watts. This is my first off grid experience so I'm only guessing out of common sense.

My question is, how much power is consumed by three 6v 500mA adapters that are used for the lights in comparison to using one 120v 40w bulb and, did I waste my time, or are they using less energy than a standard house light as I hoped?

Thanks!