This stand has four adjustable and two fixed mesh shelves with five T5 grow lights. These are specialty horticulture 4" high output T5HO bulbs housed within a polished aluminum reflector. The shelf is made of plastic coated iron, making it very durable. Shelves adjust in 1" increments and hold four plastic trays per shelf. Twenty trays included. 300 lbs. weight limit. 48"W x 18"D x 82"H.