The sulfur lamp is the size of a golf ball and emits a bright and efficient light when energized by the same type of microwave energy used to cook food in microwave ovens.
(The sulfur lamp; is; the size of a golf ball) (microwave energy; used; to cook food in microwave ovens)
The sulfur lamp microwave energy
is used
the size of a golf ball
to cook food in microwave ovens