Yes, 300 watt CFL they are about 4" diameter x 8" long 300 watt output actual 80 watt usage. they put out a lot of light I was thing about putting 10 in my 30 x 40 garage
They make all kinds of CFL cans you will have to visit an electrical supply house to get them though. They are not an HD or Lowes type item and they are expensive. It would cost a lot less to just buy regular can lights and put self ballasted CFL lamps in them.