WTS 5600KT5's

I have 6 4ft T5 bulbs (54watts each) for sale. they are 5600K with about 1 month of use on them. got it as part of a deal on a new fixture for my reef tank, but don't want the low-K bulbs over my reef, but they'd be perfect for a freshwater setup or a saltwater refugium (chaeto, algae scrubber, etc), hydroponic setup or pretty much anything else. in fact, they'd make a nice light for general purpose too, but not many household fixtures are T5...

$15/pair or $40 for all 6