how about incandescent .... they will give off some heat to help keep you warmer.
They are now GONE! As of 1 January it is illegal for stores to reorder incandescent lamps so when the present stock is gone, that's it - we will have to buy them from China!
I guess the lamp makers weren't making enough money on the lowly light bulb (which contained NO hazardous material whatsoever and don't burst into flames!). I have 9 100W incandescent lamps over the work area in my shop and, frankly, I APPRECIATE the heat when it is -40 outside! I also have 2 4-foot fluorescent fixtures that are almost 40 years old and still work fine - think I have changed a total of 2 tubes in that time. They are poky to start in the cold but they get there eventually.
When my incandescent bulbs start to die and I can't get any more I guess I will look at halogen - its about the only thing I know of that will start in the deep cold, doesn't cost two arms and a leg, and wont set the place on fire when it fails. (I wont even allow compact fluorescent lamps in my house any more, not after one filled the bathroom with putrid smoke!)