The light spectrum of the grow light is therefore important. I made some research on the lights I bough.
There isn't enough energy in the short wavelengths. The grow light setup currently has 2 tubes, and will soon have 6 tubes in a 3x2 setup, with ~ 2-3 inches separation between each fixture. That gap is enough to fit a line of blue LEDs in between and gives a useful boost.
Here are the full specifications on the Ecolux lights used in my setup:
- Initial lumens=1900
- Color temperature=3100K
- Color rendering index=90
Next step will be the design of the LED lights.