No Switch. oHLC” series heat lamps are designed to provide a pleasant radiant heat that warms pigs, chickens, lambs or calves. Both series are designed for use with a maximum 250W brooder bulb and are compatible with energy efficient 175W Par 38 halogen bulbs (bulbs are not supplied). All Canarm heat lamps have vented reflectors and a strong, easy to open wire guard. They also feature porcelain sockets with a plated copper screw shell for longer life & resistance to bulb damage. All units come with a heavy, grounded 3 wire cord set and are CSA approved specifically for use as a brooder in an agricultural environment. Features strong vented steel reflector is white epoxy coated for improved corrosion resistance and longer life • Heavy gauge plated wire guard •8' (2.4 m) grounded cord . Package of 10 units.