sowing of big onions

Now that the weather is a bit milder i decide to sow my onions for 2011. because of the cost of electricity these days i have decided to carry on in the old fashion way of keeping every thing warm by using newpaper and attic insulation meterial made into a blanket. I have done this for quite some years and have found it very good. as regards to light i am using a 40w bulb in the nights and natural light in the day time. Will give updates at a later stage with pictures.