I did a little experimenting with some 5000k and 6500k mix cfls on the autos in veg because I knew something was missing or off. The autos were just not growing as fast or as big as when I had 1 LED with cfls for extra light on the newer auto in veg. I just dont think there is enough blue spectrum in the mars 300w led. Ill post a before and after shot with the cfl being added and only 35 hours after adding the cfl and 29 hours of actual time the lighting is on since I run 18/6. Ill post a pic of the light bar I built so each set of plants get 2 x 23w cfl with a 5000k and a 6500k bulb.
Before
After
Light bar
Before
After
Light bar