39Watt , Decided to go with 15k bulb instead.
Like new cond, still in original packaging , have receipt.
only used for 5 weeks, 10hrs/day.
the bulb has 4500 hrs Useful life.
$27 at J&L after tax.
Asking 12$.
http://www.jlaquatics.com/phpstore/s...ct_ID=lb-utad3
10,000 Kelvin Temperature
Best used for Fresh and Saltwater tanks adding vital photosynthesis.
Unique blend of Tri-band phosphors and high color rendering.
Useful life - Approximately 4500 hours.
Actual bulb length: 34"