i posted some clips using this setup with t he gates VL-8's. it got moved to the editing,posting, and sharing forum. the lights are bright but they dont go very far at all. really dont see anything until your witin a few feet of target. didnt get a chance to try them at night.
When designing these lights, we asked the question "What's the perfect beam angle?" There is an obvious trade off between a wide beam / shallow light penetration and narrow beam / deeper penetration (it's not a linear relationship). The end result: 78° actual underwater. And this is the Effective Beam Angle -- that is, 78° marks one full stop difference in light from center to edge. The light is distributed very evenly in between. This seems to be a sweet spot for video lighting -- not too wide, not too narrow.
And it's important to note that this measuring technique comes from LMI. We have discussed and hope to develop standardized testing to provide an 'apples-to-apples' comparison of underwater video lighting.
J-
Hey John,
Very interested in your interest in a standardized testing method. How do you propose to create one and what would be the factors involved? There is the angle of light spread, color rendering index and light penetration to consider but what other things factor in? If this is something you develop, how then would it be adopted by other companies as a legit measure to go by. I would also like to learn how you came to the conclusion that 78º is better than, say, 65º or 90º. Very interested in how your R & D on this created your final results. I'm always learning something.
Steve
Hey John,
Very interested in your interest in a standardized testing method. How do you propose to create one and what would be the factors involved? There is the angle of light spread, color rendering index and light penetration to consider but what other things factor in? If this is something you develop, how then would it be adopted by other companies as a legit measure to go by. I would also like to learn how you came to the conclusion that 78º is better than, say, 65º or 90º. Very interested in how your R & D on this created your final results. I'm always learning something.
Steve
The most important aspects are a) light output b) evenly distributed c) over a defined beam angle. Once a standard is developed and published, participation by other companies will be voluntary. However, LMI has already started testing many other lights for comparison, and it's quite revealing. http://www.uwimaging.com/sola1200v.html.
J-
Yes, I have seen that comparison on their site before but since specific models of the 'other' brands are not listed, you really don't know which light they are comparing. While I have never personally used the Green Force lights, I have seen them in use and their spread is certainly wider than what I see there. Will be very interested in what your company comes up with. Is there a timeline projection for this to come out? Thanks
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