6 Foot LED Build

[StirCrazy]

Originally Posted by reefermadness

Personally I have 20 RB and 6 CW and it still is not nearly as blue as my 20k Radium. Those cool whites are super yellow and need tons of blue to wash it out. I would have gone more at least 3 RB to each CW.....but I like it 20k +actinic look.

To me a 50/50 is no where near 14k. The 2:1 ratio of RB to CW is more like 14k to me.

what kind of LEDs are you using and what batch number did you get for your cool whites? the good ones are 6500 to 8000K which has no yellow at all. at worst they are 6500K, which still shouldn't have any yellow. any bin number for "cool white" should give you a white with a slight tinge of blue.. kinda like a ice white for the lower batches and a real light blue for the good batch numbers.. now this is for the older ones and I notice that some of the newer ones are down to 5000K for the bottom end of the range but this should still not show any yellow. nutral white might have a tinge of yellow, but the warm white is where you should get your yellow.

[lastlight]

Originally Posted by reefermadness

Personally I have 20 RB and 6 CW and it still is not nearly as blue as my 20k Radium.

Is that Radium on an electronic ballast? On a M80 I find it to be blue certainly but much closer to white/blue than other 20k bulbs I have seen...

[reefermadness]

Originally Posted by StirCrazy

what kind of LEDs are you using and what batch number did you get for your cool whites? the good ones are 6500 to 8000K which has no yellow at all. at worst they are 6500K, which still shouldn't have any yellow. any bin number for "cool white" should give you a white with a slight tinge of blue.. kinda like a ice white for the lower batches and a real light blue for the good batch numbers.. now this is for the older ones and I notice that some of the newer ones are down to 5000K for the bottom end of the range but this should still not show any yellow. nutral white might have a tinge of yellow, but the warm white is where you should get your yellow.

I got my Cree XP-G Cool Whites from rapidled. I ordered two different times and both look about the same in colouration. Sorry I don't know the BIN numbers on them. To me they should be called warm white.

If you go back and look at the old 6500 MH people used...they are not pure white either, they definately had yellow. A pure white is more like 10k....and think of an XM 10k bulb, that IS white.

Anyway they list these LEDs at 5000-8300k. To me this range is not pure white and either are the LEDs.

Originally Posted by lastlight

Is that Radium on an electronic ballast? On a M80 I find it to be blue certainly but much closer to white/blue than other 20k bulbs I have seen...

My radium is not on an electronic. Its on a magnetic ballast but not the M80 because it's 400w. With just the MH running...I don't find it all that blue.