birding-aus

Spotlighting

To: Birding Aus <>
Subject: Spotlighting
From: David Adams <>
Date: Wed, 23 Sep 2009 08:13:20 +1000
On Tue, Sep 22, 2009 at 8:40 PM, Kingfisher Park Birdwatchers Lodge
<> wrote:
> Hi Folks,
> To add further to the spotlighting debate the following links have some
> interesting information regarding research.
>
> www.jcu.edu.au/rainforest/infosheets/possum_*spotlight*.pdf

In case anyone else has any trouble with the download, I had to take
the * out of the link to make the link work.

I've read this info sheet before and thought it made a good point: a
brighter light makes animals turn away before you can see them or
makes them leave more quickly. Conclusion: use a less intense light
and you'll see more.

The question I've had from this paper is how bright is right? The
author talks about "under 30 watts" - I spent some time shopping for
torches and none of them indicate their brightness in terms of watts -
or in a unit convertible to watts. Can anyone suggest what "less than
30 watts" means in terms that are commonly used with
spotlights/torches?

Thanks very much.
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