yea dont worry you can still grow some good buds you just cant grow them that tall unless you have more lighting cause then your plants wont have enough light to penetrate to the bottom ot the plants. I'm guessing thats why they say dont wait to long for veg stage? dont really know tho but I'm assuming that could be 1 reason, anyways good luck on the grow and yea dont wait to long to go into Flower. Oh I remember Zandor saying that for Flower the bulbs should be around 4000k so look into ur bulbs to see if its close in order for ur plants to produce some nice buds