Green light in the 500 to 620 range is ideal for plants with thick growth cover, as it can penetrate top foliage for better light retention. Red light in the 600 to 730 range promotes flowering for later stage plants.
Besides, are LED grow light bulbs any good?
Specific LED Grow Light Info
If you balk at the cost of using an LED system, consider that the bulbs are 80% efficient. That means they convert 80% of the energy they use into light. With good LED lights, they draw fewer watts (electric energy) while producing brighter light as compared to regular grow bulbs.