With some extra calculations done it seems my 600W HPS is many times more effective than my 125W LE veg light.

In the blue spectra I get aprox a 100% gain from pure wattage. But in the rest (and yes plants even in Veg use a lot of light outside the blue as well) the gain is about 8-10 times.

So, in no spectras is the gain less than 100% and in the rest the gain can be multiplied many times.
Only loss is that I have to run 600W instead of 125W 24 hours a day which is a bit more expensive but electricity is quite cheap in sweden anyway. Grow grow plants.
I'll take my cooltube apart later tonight or tomorrow and get the sun for my plants tuned up a bit hehe.

Puffzter