Purchased LED lighta

A question from a fellow grower:

Robert I just ordered some led lights, red and blue. Are these good for first growth? And if so how close should I place them.
I ordered 4 bulbs and have made a fixture that places the bulbs 8" apart. In a square pattern.

This is the specs.

17.5 Watts Power Consumption, Replaces 90 Watts

Delivered PAR Output - 15 umol / s (Blue/Red Spectrum)
Typical Light Levels:
88 umol/(m2/s) @ 2 Feet
48 umol/(m2/s) @ 2.5 Feet
29 umol/(m2/s) @ 3 Feet

Thanks in advance for any help you can give me!!

Apache Tech At600