Product Features Light Height can extend from 6" - 12" (15 - 28 cm) above the aquarium Light Width can extend from 4" - 6.7" (11 -17 cm) to center the light position Ventilating fan with quiet cooling performance to keep light longevity Adjust to any range of spectrum color by setting the...
what I use for my refugium is a $3.50 bulb from home depot - got the info from here (thank you @melev as this has been very successful for me for years now!! (hugs))
jcpaquarium.com
