I have in inventory over 8000 of these LED plug and play units. They're original price is $139 each.
They are made by Foreverlamp, they are UL certified 5 year warranty units.
They will save you 50-60% off your energy bill, guaranteed. They work for ballasts from 175W to 400W.
Here is the link, please note I do work Inside sales for this company, I can help you get any of our products. BUT this post is specifically about the GS link, which is linked above.
http://foreverlamp.com/led-retrofit-...s-series-400w/
Original price 139, now 85 w/ free shipping.