at Pamida they have a 5 shelf unit that is 48 inches wide...perfect for lights..all plastic...for $60..pretty cheap
I don't know where you are located, but if you have a Sam's Club or B.J.'s Wholesale Club near you, You can get a chrome wire 6 shelf setup that comes with both 4 locking swivel wheels or stationary legs. It's 72" high X 4' long, and will convert to two 3 foot high units. It's a snap to put together with no tools, will hold 500 lbs and costs $ 69.98 plus tax.