Ok well i have never used cfls but i have used t5..and leds to veg..i used an 8bulb 4 foot t5..and 2 Vipraspectra dimmable 600 watt lights..looking to sell both leds and use the t5 for veg seeds and clones..and i veg between 3 and 5 weeks...i use 1000 watt hps to flower...also tried both of my...