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--=====================_1311938==_.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed At 07:06 AM 7/25/99 , kirvine@sa*.ne* wrote: >18 watts. The reason I used the "..." for terms like "bright" is that we >are talking the "effect" that we call "light" in water, chief. I just >explained what is really going on, and that is the reason you can "see" >further and "think" the light is brighter. The rest is horsehit. > >Also know that they are putting most of their energy out in the form of >light, not heat, so you can turn them on out of the water without >worrying about meltdown. Just for the sake of argument... The big reason that you've got more light chief is because you have an 18 watt HID bulb that's putting out the same amount of light as a 100 watt tungsten bulb - 80% of its energy becomes light, the opposite is true of tungsten. Not so much because you've got a higher color temp but because you've got more brightness. If color temp was the only factor you could simply put a dichroic or CTB filter on a quartz lamp to achieve the same effect. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Melendez melendez at bigfoot dot com http://www.bigfoot.com/~melendez --=====================_1311938==_.ALT Content-Type: text/html; charset="us-ascii" <html> <font size=3>At 07:06 AM 7/25/99 , kirvine@sa*.ne* wrote:<br> <blockquote type=cite cite>18 watts. The reason I used the "..." for terms like "bright" is that we<br> are talking the "effect" that we call "light" in water, chief. I just<br> explained what is really going on, and that is the reason you can "see"<br> further and "think" the light is brighter. The rest is horsehit.</font><br> <br> Also know that they are putting most of their energy out in the form of<br> light, not heat, so you can turn them on out of the water without<br> worrying about meltdown.</blockquote><br> Just for the sake of argument... The big reason that you've got more light chief is because you have an 18 watt HID bulb that's putting out the same amount of light as a 100 watt tungsten bulb - 80% of its energy becomes light, the opposite is true of tungsten. Not so much because you've got a higher color temp but because you've got more brightness. If color temp was the only factor you could simply put a dichroic or CTB filter on a quartz lamp to achieve the same effect.<br> <br> <div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div> <div>Mark Melendez</div> <div>melendez at bigfoot dot com</div> <div><a href="http://www.bigfoot.com/~melendez" EUDORA=AUTOURL>http://www.bigfoot.com/~melendez</a></div> <br> <br> </html> --=====================_1311938==_.ALT-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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