Premium just switched to a new handling-charge schedule for
t5 bulbs. If 4 or more 24” or 36” t5 bulbs are ordered the box fee is waived - OR - if 6 or more 48”, 60” or 72” t5 bulbs are ordered, the box fee is waived.
http://premiumaquatics.com/aquatic-supply/T5flo.html