i think he is asking about bud density, not putting his thumb on the scale.... geez..... there are several things to make your buds more dense, more light yes, but also either co2 or better than average air flow, not just movement, fresh air intake and stale air exhaust. Nutes, nutes, nutes, I believe one of the best keys to density is to keep building there nutes as they grow, but key is to know your program and not over do it. One thing I do too that I think helps, I use small babboo stakes, 4-6 per pot 2 weeks into flower, and spread the plant and tie to stakes with bread ties, I also cut the bottom 2-3 levels of branches off, u lose those bottom loose buds but gain bigger denser top buds. Also temp, too much flux will make for whispy buds.