LED light for 20 gallen tank

[yumuism]

I juz install a led light for my 20 gallen tank, deep is 19 inch

Luminous Intensity:*
Blue 300mcd/1pcs **
White 1400mcd/1pcs
Colour temperature:*
Blue 12000K, White 8000K.
LEDs: Blue 12pcs, *White 84pcs.
Power Consumption: 56mW
Input power: AC 100V-240V
Output Power: DC 12V
So this light is enough for coral to grow?
Thanks. I'm new in reef tank...

 

[Magnetic Reaper]

it's definitly not enough. at an optimum 60 degree spread, it's equal to half of a 1W cree led. in a 20G tank, you'd have like 9x that.

judging from the large ratio of mcd to mw, you probably have a 10 degree spread per led
it's probably not even enough to grow algae