9 Watt LED Grow Bulb for algae scrubber

[Jyetman]

I purchased a Feit 9 Watt A19 with Red and blue diodes how strong is this bulb? Its in a reflector hoping it enhances the 9 Watts how close to the screen should I go?
https://www.walmart.com/ip/118527864?wmlspartner=wmtlabs&adid=22222222222000000000&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=10352200394&wl4=kwd-1103028060075&wl12=118527864_10000001015&wl14=feit%209%20watt%20led%20grow&veh=sem

 

[Crusinjimbo]

I don't believe that bulb will work well. To get you in the ballpark, you should look for a bulb that uses red (660nm+/-), directional output to focus on your screen, and capable of actual output equivalent to at least 1/2 watt per square inch of screen. The screen should be about 24 square inches of illuminated screen for each cube of food to be fed per day. This is a major oversimplification of lots of research by other smart guys. More info in the Advanced Section in the Stickies. They definitely work well!