Mirrored bulbs reflect a lot of heat back to the lamp holder. Depending on the space around the lamp holder, the heat might build up above the recommended temperature, especially if the heat is trapped when moving upwards. For this reason, the max. wattage indicated does not apply to mirrored bulbs, but to non mirrored bulbs only. If mirrored bulbs are desired, only those with a low wattage (such as LEDS) should be used. The max. wattage for mirrored bulbs is 5 watt LED (equivalent of 40 watt traditional bulb).