11-19-2013, 12:11 PM
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I think you're right, Seahorse - if the lighting was over-bright and left on for long periods of time, it would theoretically lead to increased stress, and ultimately death. . . the circadian rhythm is important to humans and animals alike. But . . . yeah, it's a big leap for sure, and more likely that something else was the cause of the deaths in this tank. I know many people who use the same types of lights in salt and freshwater tanks.
Either way, sorry for your loss, Brian. :(
A shoplight with two bulbs from HomeDepot will work perfectly for your tank, and as was mentioned by the other posters, you will want a 'daylight spectrum' (which I believe is 6500K) to get you closest to sunlight. Daylight spectrum is required by plants, but since you don't have those, you can go with any type of (cheaper) bulb. There are lights manufactured in a color spectrum to best allow the fish's colors to show, and many prefer to use these in tanks that have no plants, but I'm not sure off-hand what that spectrum is. . .
Hope this helps!