1961 Led Kit offers easy conversion from our 1961 T8 luminiare into a high quality led luminiare. Included geartray with Led's and driver(s). 120 deg means tilted led's, 0 deg mean Led's pointing straight down. 2800lumen Kit is upgrade for 2x14W T5 or 2x18W T8 tube versions (2ft). 5500lumen Kit is upgrde for 2x28W T8 or 2x36W T8 tube versions (4ft). For Navy purposes, please contact your sales partner for more information.