How are these light specs for a 40breeder?

[Jason A.]

I found these at harbor freight and $20ea I was thinking of using 2 of them. Specs are in the picture.

[nabokovfan87]

Looks really, really strong blue light. which is good and bad.  It's a full spectrum light, it would work, but I can't say it'll be "perfect".  For comparison, here is the spectrum chart for a 6500K light rated for aquatic plants:



The blue is about the same, red is lower (this is not an issue, this is "fine" for both).  The area below 0.5 on the lefthand scale of the chart is what I'm looking at.  Optimally, I believe you'd want that area to be as filled across the spectrum.  You would then tweak the different color channels higher / lower to do what you need.  So in my case, I crank blue WAY down to try to help fight some of that strong blue light.

This also might be a better place to look for what I'm trying to get at. 
https://www.2hraquarist.com/blogs/light-3pillars/6500k-is-best
https://www.2hraquarist.com/blogs/light-3pillars/light-wavelength-indepth


 

Quote

What is important is the relative area/size of peaks. To appear neutral white light, a light will have spikes in blue, green and red. A light that is all blue and red, with very little green will appear pink/purple and cast a reddish hue over the tank. In this way, we can roughly gauge the overall colour rendering tone of the light by reading the spectrum chart. 

 

Edited September 24, 2022 by nabokovfan87
clarity