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Old 10-02-2003, 12:37 PM   #11
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led's when run properly should generate no heat at all, as they are nearly 100% efficient, converting all energy in into light going out

there are many products out there similar to your idea with the led's set into a block of clear plastic

as long as you test your setup first, and then seal it in, your setup should be fine ... and LED's run for 100,000+ hours, so you don't need to worry about them burning out any time soon
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Old 10-02-2003, 12:50 PM   #12
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That is sort of good to know, I was just going by the power led on my PC that gets quite warm to the touch.
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Old 10-02-2003, 01:11 PM   #13
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I have a normal output (NO) ballast that came with that tank I am sure I could find room for. I wonder what a simple 15W black light would do? ripple shimmer effect ...hmmm? Anyone knoe before I blow $30 on a 48" bulb I'll never use?
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Old 10-02-2003, 11:58 PM   #14
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Found this site on how to wire leds and calculate the resistor size
White-Leds wiring guide

I picked up 2(all they had) Bright Blue Leds from RadioShack, forward voltage of 5v and 20ma draw. So for a 12v power source with these 2 leds put in series I need a 100ohm resistor. Just need to wait for them to get more stock

How many leds should be put over a tank? Actually 2 tanks totaling 8 feet in length. Um.. 10 feet if you include the betta tank.
Yea tank's are taking over my basement
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Old 10-03-2003, 01:17 AM   #15
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Quote:
Originally Posted by reefnewb
I have a normal output (NO) ballast that came with that tank I am sure I could find room for. I wonder what a simple 15W black light would do? ripple shimmer effect ...hmmm? Anyone knoe before I blow $30 on a 48" bulb I'll never use?
48" bulb would be 40 watts, not 15 watts

look for the "blue" blacklight instead of the "purple" blacklight I think the code is F40T12/BO instead of F40T12/BL

the purple one gives off too much UV and not enough visible moon light. the blue blacklight gives off a nice blue light along with UV

fyi real moonlight has almost NO uv
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Old 10-03-2003, 01:19 AM   #16
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Originally Posted by peterp
How many leds should be put over a tank?
I would use at least 6 if not 9 leds for your tanks, either spaced out for even lighting or grouped in little bunches for the "spotlight" effect
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Old 10-14-2003, 11:54 PM   #17
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Came across this idea for moonlights at the cichlids-forum DIY

I'll have to wait to go to town to find a shop that sells this stuff.
But if the marker strips are around 20$ each or so it would match what it costs me to make a one.
Here's hoping they are not outrageously priced
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Old 10-16-2003, 05:39 PM   #18
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Using LED1086 from www.bgmicro.com which are $1.95 each have a 15 degree spread, 6000mcd, 10mm, 3.5v forward drop. at 24" they spread about 6.5 " therefore i place them 3/4 of a foot apart on the horizontal spread and 1/2 a foot apart on the vertical spread. I am adding a 250 ohm resistor in the middle to consume the excess voltage and I am assuming approximately 1V drop due to the wire length on the long runs. This is just an idea. any suggestions are greatly appreciated. TIA

the red wire is positive and fuschia wire is negative, blue dots are LED's for a total of 14. Will this be too much light for the effect of moonlight?
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Old 10-16-2003, 10:57 PM   #19
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that sounds a bit too many ... maybe use a pot along with that fixed resistor, so you can dial in the brightness.

if you're looking for even, smooth and consistant moonlighting, rather than the 'spotlight' effect of a few specially placed bulbs, look into neon ... maybe there is a nearby DJ shop or party store, where you could get a blue neon tubes (standard 40 watt t12) ... one of those should be $15-20 and would do an excellent job for ya.

or how about EL film or tape ... inexpensive, easy to work with and has an erie blue glow
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Old 10-16-2003, 11:00 PM   #20
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i was shooting for full coverage, maybe have em all on timers like the moon is going over head through out the night lol
that would be a little much.
is it true that the neon does not give the shimmer effect?
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