The Coralife Aqualight Blue Moon Glow LED light has a mounting base that can be
screwed to a canopy (or attached using the suction cups supplied).
The Coralife Blue Moon Glow LED Lights are meant to be used as night lighting
for aquariums during the 12 or more hours when the high output daytime lighting
is turned off. Use AT LEAST two for a 18 to 36 inch tanks, three for 48 inch
tanks, and four for 60 and 72 inch tanks. Please keep in mind that these lights
are very low output on purpose in order to not interfere with the natural night-time
period of your aquarium's organisms.