The best light for vegging is induction hands down. 100w will produce you as much usable PAR lighting as a 300-400w HPS/MH without significant heat. Fact: The majority of people have never used induction, so most people can't even comment. I've used CFL, T5, T8, T12, MH, HPS, Plasma, and Induction for vegetative growth and am most impressed with Induction lighting's ability to keep the plant from stretching despite the distance of the light, as well as creating very tight internode spacing, not that the other types of light can't achieve these results, but my plants seemed least stressed, most vibrant, and healthy when under the induction lighting. It just seems like it gives them ton of what they need, instead of just barely getting them what they need while having to expose them to a ton of light they never wanted.
At a certain point you have to say fuck what everyone else is saying, buy a light (or two different ones at one time) and see how they do side by side the with the same strain. Pick the one that worked the best, then either be content with having one that was "better" than the other, or move on to the next test by purchasing another different type of light and do the test over again. Repeat the process until you've tried all available lighting and have confirmed your own choice. That's what I did and I came up with Induction.