Eric, which white led's do you recommend for illuminating an 8" deep 4' x 8' D/F sign cabinet, with white poly faces? I will be sticking them to 1" aluminum square tubes that will be installed in the middle of the cabinet instead of fluorescent lamps. Please advise.
You can space a little farther apart, I'm just suggesting for bright even lighting. You can always play with the spacing and it is all dependent on white face type too.