Item Code: 1402012

* The Coralife 20,000K fluorescent bulb casts a nice blue daylight that simulate the deeper ocean environment.
* Unlike other bulbs with a high blue component, the 20,000K has a bright, high-intensity output allowing light to penetrate deeper into the aquarium.
* These high quality Coralife bulbs are perfect for the one who likes the white/blue look.
* 40W Normal Output (NO) bulb.
* T12 1.5" diameter bulb (standard shop lights are T12).
* Note: On a rare occasion, bulbs are shipped to us without their outer bulb sleeve. If you must have the factory sleeve with the bulb, please note it in the "Comments" section on page 2 of the order check out. This may delay your order if we're out of bulbs with sleeves. Remember, MOST of our orders are shipped WITH sleeves. Thank you for understanding.

FAQ:
Q. What is the difference between 6,500K, 10,000K and 20,000K bulbs?
A. 6,500K appear to be a bit dimmer to the eye to us. 10,000K appear to be the best looking "crisp white", and 20,000K appear to be blue/white light. Natural yellowish sunlight is about 5,500K. The higher you go in the color temp "K", the more blue a light will appear.
Q. I plugged in my new Coralife bulbs, and noticed a slight flicker strobing effect at the ends, is this defective?
A. It depends. There can be many causes to that type of strobing effect. Most of the time, it occurs on new ballasts, and will go away after a few days. If it persists, then it could be a number of things, such as a bad ballast, or incorrect ballast. Give us a call at 877-995-2677 if it doesn't go away after a few days, and we'll do our best to help you out!

CORALIFE DAYLIGHT Normal Output (NO) and Very High Output (VHO) length and wattage list:
18" NO = 15W, VHO = N/A
24" NO = 18W, 20W, VHO = 75W
30" NO = 25W, VHO = N/A
36" NO = 30W, VHO = 95W
48" NO = 36W, 40W, VHO = 110W
60" NO = N/A, VHO = 140W
72" NO = N/A, VHO = 160W