So, I have an 8 gal tank. 40cm*25cm*28cm (Yes, I use metric). It's LPS dominated with some softies. Currently there's 2 actinic T5 bulbs in there. I'm planning to upgrade to a T5 LED system. I already have the T5's and I plan to DIY my led. There's a local seller in my town that has 3W HPL LEDs in different colors and wavelengths, not CREE tho. They has some CREE LEDs but they only sell the 5W model which is overkill. My question here is, how many LEDs should I use and which wavelengths?