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Your're right! :thanks:

Oh, great, though i'm afraid if i can make it, it's worth to be tried.

Thanks for your suggest friend! but it maybe a little harmful for birds... but thanks!

Actually, just a little wider than normal 10mw laser pointers would be enough. Trees maybe 7-15 meters tall. I would like the lasers can be see a dot in the bright-and-sunny day. would it be possible? :cryyy:

I have bought two laser pointers in the past and both have too thin/narrow a beam for my purpose. I am a biologist and we use these for highlighting tree positions for animal/bird watching. I need 10mw power, colour green, that can be seen in daylight, and has a good 'relatively wide' beam...