The most wide-spread lamp type (incandescent) is also the most inefficient one. It is more like a heating convector that just happens to produce some light. Per watt input power, incandescent lamps produce typically about 10 lumens. Cf below graph, fluorescent lamps do a factor 8 better, while technologies exist today to achieve more than factor 10.
Going the other extreme, a candle just produces 1 lumen/watt, and is even 10 times less efficient than an incandescent lamp.
Figure: light efficiency for various technologies (source: European Ballast Group)