We had 2 full sized oil lamps. The fumes from oil lamps are minimal. We opened the window once in a while for fresh air. We did not leave the lamps burning while we slept, as this would be a fire hazard. We just bundled up and slept in bed with our children, in sleeping bags, to stay warm.
Lamplight farms make a good brand.
We turned lamps off or down in the daytime as it got warmer outside. I called Lamplight Farms and they have a variety of different types of lamps and lamp oils - some are beautifully colored and scented. The person I spoke with said that their lamps are more like nightlights. They'll work to give light but probably not enough to read a book. As I prepare for Y2K, here are three ideas to help conserve heat.