Yeah I done it as I'm on 220v and its still 280w -300w each panel. watts divided by volts to get amps. So on a 220v circuit that would be 300 divided by220 = 1.36 amps. On 110v circuit it would be 300 divided by 110 = 2.72 amps. So its still 300 watts on both voltages.
However the efficiencies of 2011 led's is much better compared to 2009 led's, have a look at this link and you'll see what I mean
http://www.youtube.com/user/gothamproducts#p/u/3/Uvn_Px_xCjg
Don't forget I am only vegging under the 240watt blackstar veg model, now that is only drawing 130watts, but it is amazing at vegging the plants, so in reality 1/3 of my grow is using a lot less electricity. So when I do my weigh in should I use Gramms/watts or grams/KW hours. Ooh this could start a whole new debate couldn't it.