LED Parking Lot lights Parkinglot lights are relatively easy to retrofit for a qualified electrician. Most LED heads swap out using the same line volatge as the existing HID heads. There are several LED Corn lights that can be used to convert these. For example: New LED Corn Lights have a line voltage rating from 120v to 277v meaning you can swap out standard 120v line voltage or 277v lighting with Corn lights. The lumens on these can be far brighter than conventional HIDs as bright as 6500k.