True Violet leds

[dubaygv]

I am looking to add some color to my tank since the halides dont give the pop that I'm accustomed to from the leds. I found these some true violet leds from led group buy .com but rc won't let the web address for anything on that site be posted.

I was thinking of running 18 cree xt-e royal blue and 12 true violet leds powered by a 75 watt inventronics driver to add some blue/purple pop to the 14k halides.

Does anyone have any thoughts on this setup or has anyone seen these violet leds in person? I've heard that it takes a while for the orders to come in but has anyone local ever bought anything from led group buy .com (all one word)? In the past I've bought from reefledlights and rapidled, but they're more expensive and they don't offer the violet leds.

 

[gflat65]

Have you tried posting on the LED forum on the other site? I've not had experience with those particular LED's yet, but someone over there might have (is there an LED forum on RC? Haven't checked...). I've just about saved enough to replace my VHO's, so I may want to try some violets, too...

 

[mike_dani]

I will be adding some to my LED build, being they have a 420 nm spectrum they should as a actinic. From what have read they should be added at a 1:8 ratio.

 

[dubaygv]

I think I'm going to try them. I've heard that they don't put out much light but the spec sheet on them is about 300 where royal blue crees are in the low to mid 500s. I don't think it will be an overpowering purple, but it should add some nice color.

 

[gflat65]

Mike-the 1:8 ratio. Is that to white, or to rb's?

 

[mike_dani]

It is in total. Take the total number of LEDs say 48 and divide by 8. You would want 6, you need to remember that the amount of light "par" as we measure by is very little and you are only using them as actinic spectrum in the 420 nm range. I will use 24 over the 300 that has 180 on it all ready.

Hope that helps.

 

[gflat65]

Thats about what I was planning over the 280. (180) 3W- (72) RB, (72) CW, and (36) NW were my initial thoughts. I could run an additional (24) violets on a single ELN D. Might sprinkle in some reds and greens, too (though likely at an even smaller ratio).