Tom@HaslettMI Posted January 13, 2014 Share Posted January 13, 2014 I'm adding six HV LEDs (http://www.ledgroupbuy.com/exotic-hyper-violet-led-430nm/) to my 75 gallon reef light set up and am wondering if I should use the 80* optics I purchased. The LEDs sit about 10" off the water surface and it is a standard 75 gallon tank (21" tall). I currently run 10 3-ups without optics and recently added 4 OCWs and 4 cool blues all with 90* optics. Any input is appreciated. Please let me know if I missed any pertinent information. Thanks, Tom Link to comment
jedimasterben Posted January 13, 2014 Share Posted January 13, 2014 I would. More light in the tank and you wont be able to see any spotlighting from them, but you wont really notice anything from just six of them unless they're the only LEDs on. Link to comment
TheKraken Posted January 13, 2014 Share Posted January 13, 2014 In my system I don't use optics for better color mix, but my tank is just shy of 12" deep. With the depth of your system I would use them. Link to comment
Tom@HaslettMI Posted January 13, 2014 Author Share Posted January 13, 2014 Sweet. Thanks for the speedy replies. Tom Link to comment
Tom@HaslettMI Posted January 18, 2014 Author Share Posted January 18, 2014 Are the optics supposed be impossible to attach? I have the high temp silicone but the square hole in the optic is not fitting on the LED. What am I doing wrong? I linked to the LEDs above and these are the optics I have: http://www.ledgroupbuy.com/cree-led-optics-lens/ Thanks, Tom Link to comment
jedimasterben Posted January 18, 2014 Share Posted January 18, 2014 I've got the same problem. There is a little piece of shit solder joint to one side of them that keeps the lens holder from sitting flush on the board. I had to end up cutting part of the holder out with a razor blade. It sits less tight up against the LED, but the silicone is what's supposed to hold it, anyway. Link to comment
Tom@HaslettMI Posted January 18, 2014 Author Share Posted January 18, 2014 I was suspicious of that little bit of solder myself. Looks like I need to get the X-acto knife out and start hacking (the optic that is). While I have you... I'm easing my corals in to the HVs. I have them running at 15% w/o optics at the moment. Generally speaking, how quickly should I increase PAR values? I was thinking about bumping up 5% each week until I reach target PAR. Is that too slow or too fast? Thanks, Tom Link to comment
jedimasterben Posted January 18, 2014 Share Posted January 18, 2014 You only six over the whole tank, they aren't going to affect PAR by any significant amount, so you're fine to bump them up to 100% immediately. Link to comment
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