FS used T5 bulbs 36"
 

6 Giesemann T5 bulbs used for 1 year or less.
$5 each or all 6 for $20.
All tubes are Still in the original package.
Excellent for fish only or if you want to try different light combos.
All are different color Giesemann (white/actinic) except one is KZ Fiji purple.

I have 6 one year old T5 bulbs, (surprisingly this combo was not too blue, comparable to say 15k average)

2 x pure actinic Giesemann (normal actinic 20k)
2 x aquablue plus Giesemann (white 14k)
1 x Fiji purple KZ (purple?)
1 x actinic plus Giesemann ("super mega" blue, makes color "pop")