I'm about 70 days as well.. for one thing, I do not know a more powerful light source than the actual sun. With that being said, i think its just common sense that a good amount of sunlight would grow a bigger, denser plant. L.E.D's dont stand a chance but in my instance, they aren't supposed to. As growers, we use what we have and I, am unable to grow outdoors . Instead, I buy what i can and make due. This is an L.E.D INDOOR grow. I just can't expect the same vigor as a plant getting optimal amounts of sunlight. I can try to SIMULATE it at best but i mean, c'mon, its the sun lol. Did you expect L.E.D to out perform or match the suns power and penetration?
Even with all that said, they aren't too far off. I think I'm having a pretty solid run