Quote:
Originally Posted by Poita
For personal use in the backyard, the 1mw green laser I have seems stupidly bright and more than enough. I can't imagine a 20mw one!?!
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How far are you from a large town Peter?
Quote:
Originally Posted by Astro_Bot
Depends how light polluted your skies are. For suburban Brissie, replete with haze, streetlights and a neighbour's spotlights, 20mW is pretty handy.
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In my part of Sydney 5mw is barely visible. 10mw works pointing out things for small groups. 30mw is probably a bit much but is certainly easy to see.