Reefbreeders Fuge LED

What kind of fixture is tha?.I am only asking because IME you never want to run a bulb of this type with the glass shade on.It may cause it to overheat.Keep us updated.

 

Amazon.com: LEDwholesalers 1325RB 12 Watt PAR38 Blue/Red LED High Power Grow Light Bulb With Remote Control: Patio, Lawn & Garden

 

It's just regular living room lamp I popped it in to make sure it's not DOA/broken. I don't even haven tank/stand yet, let alone the sump.

 

Sunlight Supply also sell a similar light for horticulture:

AgroLED 12w Lamp - Full Spectrum | Sunlight Supply, Inc. - Indoor Gardening Supplies, Grow Lights, Hydroponics, and Lighting

 

Red is typically used in horticulture to promote blooming. Not to stimulate growth. That is the only reason. In horticulture growth is secondary to the bloom. The bloom is where the money's at. Anyone who smokes the wacky tobaccy can verify!

 

s you're saying these are a bad idea?

 

Lmao.;D

 

I'm just telling you the only reason a hort bulb would have so much red.

If you are asking if I think I would use it? Doubtful as I just don't think it would be a better choice. I have read no scientific evidence to support this choice of spectrum

 

No scientific evidence?


Algae will use a lot of spectrums for growth, but I found a 5:1 or 6:1 ratio of 660:450 works quite well, my chaeto doubles in size every week. violets would be an even better choice, however they are not quite bright enough to fit the bill

 

Now let's analyze the full picture. Even with your partial data, it's clear that the Blue has a higher peak than the red yet you virtually ignore the blue spectrum.

For green plants & algae the lighting peaks that are most important:
Chlorophyll-a: 430nm/662nm
Chlorophyll-b: 453nm/642nm
Carotenoids: 449nm/475nm
Red pigmented plants and algae use more light in the blue area of the spectrum.



Looking at this it seems that Royal Blue and Deep Blue should also be included in your mixture of LEDs. Those absorption peaks seem to be higher to me than the peaks of red. Now leaving science out we are talking about marine algae not terrestrial plants. Although it might not be true, I would expect that millions of years of adaptation has made these organisms quite good at utilizing the blue spectrum. Ignoring it make absolutely no sense to me.

Keep in mind I am not saying this bulb does not work. I am just questioning the choice of spectrum, not saying it's wrong.