Table lamp electric patio heater Sumatra. This is the Sumatra table lamp style electric patio heater. It has a cast aluminum construction. This beautiful electric heater can heat up to 12 feet diameter. It is perfect for cool evenings. Its heater has a 1,200 W halogen bulb which is equivalent to approx. 4,095 BTUs of heat. It has 8 Ft. cord that uses a standard 120V grounded outlet. It comes with an automatic shutoff tilt switch. It is made of weather resistant hardware and requires simple assembly.