Along with earlier activation of the cooling systems, replacing heat lamps with regular, "household," 100-watt incandescent bulbs will reduce the ambient temperature of the farrowing room. Positioning heat lamps at the maximum distance away from the sows head will also reduce the impact of this supplemental piglet heat on the sow. Finally, heat lamps may need to be shut off or run on timers (off/day: on/night) during periods when temperatures do not fall below 85° F to help reduce room temperatures. If this strategy is practiced, a source of light will be needed somewhere in the room because some producers report lactation failure if sows and litters are subjected to total continuous darkness.