From CFL to LED
 

Okay 1st year growing tomatoes & peppers from seed I started out with a CFL 6500 kelvin & 1600 lumens worked great for germination stage as every tomato seed & over 95% of pepper seeds came up. The CFL provided some warmth that let me grow peppers without a heat mat. But about a week ago I re-potted my seedlings as the had all gotten true leaves I switched over to a Sylvania 100 watt equivalent kelvin & lumens as the CFL but without the heat. I did the switch at the urging of a friend who told me to also keep the LED about 4 or 5 inches from the seedlings vs the 2 to 3 that I used with the CFL light. Maybe its me but I think this guy was right, the seedlings have really had a growth spurt! So is it just what happens when plants are 5 weeks old or does the LED make that much of a difference in growth once they have trues leaves? Thanks or your opinions on this lighting question.

I think you changed lights at the some time the growth took off.

Okay thanks Worth1 being its my 1st year its all new to me.

The only way you can really tell is to do a side by side comparison test.:)
But in my experience the seedling stage jumps into the vegetative growth stage.

Worth