I used a 40 watt lightbulb to heat my old fridge chamber in 0 degree weather. It should do just fine for a well insulated chamber. Mine was in a clamp light with foil covering it so no light escaped.
Cant answer about the controller though
Primary #1+Auxiliary: Burning River Pale Ale clone
Primary #2: empty
Primary #3: EdWorts Apfelwein #4
Conditioning/Drinking:Brewers Best Belgian Tripel, Apfelwein #3, EdWorts Apfelwein #2, Cranapple Wine, Routers Share Network Closet Strong Scotch Ale, McCormack's Old Malt Oatmeal Stout