Review dephen 300W LED Parking Lot Light With Photocell 5700K Led Shoebox Pole Light The light efficiency is up to 140Lm/W (DLC approved) which means 320W can output 44,800Lm. 320 watt led shoebox pole light dusk to dawn commercial street parking lot light please note that the light can not be used in the water. Efficiency of power supply 0.9. Saving LED products for provide solutions of indoor and outdoor lighting.