To be honest LED light cannot support most plant life, only the low-light plants can thrive in your tank.
This is wrong...
People use LEDS all the time it just cost more money when your doing a bigger tank unless you have lots of money.
That light is EXCELLENT for the size of tank your doing. The problem is your going to have too much light and no co2. Algae problems galore.
Figure out a co2 system or your going to have algae
Yellow leaves is lack of potassium.In fact it is too strong for my anubis (the leaves keep yellowing)