Rather than give you what I read, I'll give you an example of what I did. I used a MH on a batch of clones from a previous crop, and used it straight through to harvest.

The weight was about 25% less give or take than under the HPS, however the flavor and smell were a little more intense. To say that you will get a bush with "tiny" buds is a little dramatic, but you won't get the yield of HPS with it.

That all being said, if someone had one laying around doing nothing and had plants begging to flower, I would use it. It isn't doing a whole lot for you in the box, and 75% of something is better than nothing IMHO.

Here's a couple pics from the MH crop.
irydyum Reviewed by irydyum on . MH Bulb all the way through Just out of curiousity what would be the drawbacks of using a MH bulb through the flowering stage. If someone was dumb and bought a metal halide ballast and bulb and has that laying idle. It could be used throughout the whole process right? Interested in the cons of that. Rating: 5