In my first log on here I used a 400w hortilux super hps bulb from begging to end. I did start them of course under cfl just till they could take the hps.

This current log I am doing I switched from a basic 400W MH and then to a Super Spectrum Enhanced Hps for my current flowering stage. I bought the Hortilux bulb that offers 25% more energy in Violet, Blue and Green spectrum than standard High Pressure Sodium.

So not sure as of yet if it has noticeable differences of growth compared with a normal hps. If it does then then a person wouldn't have to think as much about running both during flower.With a switchable ballast you can run mh just for veg then switch to the enhanced hps bulb or one bulb str8 thru.
There is also a Dual arc 1000w MH&HPS that puts out 110,000 lumens and does look cool. Anyone messed with those type of bulbs? :stoned: