Fair points it must be said and the level of information was very helpful but it would appear everybody has there say and believe me there are other professors, director of research etc people around. You didnt answer my question about a HPS 600watt. How much power does that use? Because if i rememer rightly it uses more than 600watt? Hence why digital balasts are claiming to use less watts? Or am I jsut mistaken as I am sure I can fetch the links?

And as I have said already we should be trying to recreate the sun? Full total spectrum. Plasma do this. Yes there are bulky models like Lumateks but there are also ones which are a lot smaller than a standard hps setup. There are grows dotted around that have been done, albeit badly, under Plasma and the results are great, even in a poor environment. Especially the plasma horticulatual light poles which strcitly speaking you could have standing right next to your plants therefore creating that light at canopy level i think we should be looking for. My aramgeddon under LEd veg hav no popcorn buds, they are dense nuggets right down to the soil, i have supplental led light horizntally streaming across my canopy level.

I am wanting to ditch HPS as soon as I can so am passionate about new lighting. Plasma seems the way forward with supplemental LED lighting.

Facts are as only as good as proven results. For twenty years we have been ignorant towards lighting and still that ignorance seems bliss.

Anyone else have views on Plasma or any links? What is about is scarce but fascinating.