How powerful is the laser in a Laser Level Pro .?

you can't answer this question with out knowing the power of both lasers. If you had two lasers, one yellow the other UV, BOTH WITH IDENTICAL POWER, the yellow laser would APPEAR to be more powerful...

the color green is highest on the visibility spectrum yes it is the most VISIBLE color (they do apear stronger because of this).and they also have the longest range

No way of telling. All you've got there is the wavelength, or "color" of the laser. But this doesn't say a thing about how powerful it is.

The SuperStar has the most destructive weapon ever built. Its second most powerful is its laser. The Tentloss DXR-6 Distruptor Laser v.102b (many many upgrades from its original model), powerful...

my guess? about 10,000 mw.....