Can I change AC LED Christmas Lights Strings to DC?

"I have a host of LED Xmas lights up this year. Broadly falling into 2 types.

1. Power and controller (flash rate/pattern etc) in 1 unit - you'd need a DC-AC inverter to run these

2. Power adapter with the controller separated on the cable - look at the power adapter it should have a DC voltage and current (amps) spec on it.

Some of mine are rated at 24VDC at 150mA so I could run them off a 24VCD supply and not the adapter quite easily

HIH"

"I would just cut the plugs off and connect the strand to say... a weaker battery (I wouldn't suggest a car battery for this) and see how it is, but I'm a tinkerer so I don't honestly know if this will work. You could also try getting a DC to AC converter, plugging it into a battery and using that. We do that at my vocational for the LED's in the hallway powered by a wind turbine and solar cells.

Something like this - http://www.amazon.com/Cobra-400-Watt-12-..."