Keep in mind that the orientation of a 1W multimode 445 will vary the beam intensity as you turn it in your hand due to the rectangular shape of the bea,, which seems to make a fair difference at closer range, for beam brightness.
At night, I find the beam of 1W of 445 to be a little dimmer than that of 150mW 532. The difference to me comes from the contrast and precision of the 532 beam compared to the 445. BOTH however reach as far as the eye can see into the sky and can be clearly seen by those around you.
My best analogy of the appearence would be comparing the shot of a cannon (sheer power, fatter, 445) to a sniper rifle (precise, 532) - if that helps at all.
The daytime however is a completely different story. The green will likely have a somewhat visible beam in a lit room, the 445 is dimmer, but still noticeable. The dot the green visibly reaches MUCH further due to its tighter beam, lower divergence and higher contrast to the environment. At long distances a combination of the lower contrast and larger divergence makes the 445 much harder to see.
Taking all this into account. A decent 100mW green laser with a divergence of 1mrad has an effective NOHD (nominal optical hazard distance, the distance where direct exposure to the eye is safe for 0.25 seconds) of around 80m while a 1W 445nm with a much worse divergence of 1.5mrad - 2mrad has an NOHD of around 200m+. So even if YOU can't see the dot of the 445 on that house 150m away, anyone that looks at the source of that royal blue light would likely get permanent eye damage.
So, as you likely already know, blue for burning, green for pointing/beam/visibility etc.
Oh and for the love of god get some goggles, especially if you're going to be burning. The eagle pair from "survival laser" are good and won't break the bank. Just make sure they're for 532/445.
Good luck getting your laser!
