Has anyone used 6500k CXB3070's?

@robincnn sent me some pin sinks I plan on building a veg light with. I have already on hand 4- 4000k cxb3070's I could use but was considering using 5000 or 6500k since it's more tuned to the veg spectrum. Granted, I've used 3500 & 4000 to veg as many of you have with fantastic results. But I'm interested in the effects of the higher CCT. I think it'd do a better job. Plus, MORE LUMENS!
Any input?

Good question! I want to see a full grow on just that color temp.
I used 6500k in florescent, they have a bluish tinge, a long time ago, and yes it was awesome for veg only.., so I can only imagine if you can spread the light out evenly like a florescent tube, then you will get very bushy plants. 6500k led bulbs work nicely on vegging and germinating.

ScaryGaryLed said:

I used 6500k in florescent, they have a bluish tinge, a long time ago, and yes it was awesome, so I can only imagine if you can spread the light out evenly like a florescent tube, then you will get very bushy plants. 6500k led bulbs work nicely on vegging and germinating.

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We've all used 6500k CFL'S mate. It's a rarity to see it in CXB's though. This is NOT about CFLs.

Airwalker16 said:

We've all used 6500k CFL'S mate. It's a rarity to see it in CXB's though. This is NOT about CFLs.

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had no clue they were hard to find, I think it would be a great idea to try it out for sure. And yes, those have a really good lumen rating!

ScaryGaryLed said:

had no clue they were hard to find, I think it would be a great idea to try it out for sure. And yes, those have a really good lumen rating!

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Not hard to find, just rarely used. The price of cobs makes buying such a tuned veg spectrum very unappealing. Most are using them to flower and buying 3000,3500, & 4000K.

Airwalker16 said:

Not hard to find, just rarely used. The price of cobs makes buying such a tuned veg spectrum very unappealing. Most are using them to flower and buying 3000,3500, & 4000K.

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Try it out please! I don't see any harm pioneering that area.

When I go outside right now, and see my plants flowering the color temp appears to the eyes as 5000k or so and this is at peak during the day noon. later on in the evening it turns more yellowish. but in general they get more white light than yellow light. they look different than the indoor under just 3500k.

It might help the yield it might just produce better smoke as when exposing it to different light sources.

Try it, 4k, 5k 6.5k mix,. 2 x4k on the ends with either 5k and 6.5k in the middle on each bar, or whatever configuration you are using. .


The lumens are more, but are they useful i guess is the question???

i think its no dif than hps vs mh.lots of people veg under hps but mh gives tighter nodes in general.i think you will find similar results going with 6500k cobs.if you look at the charts they all have a pretty wide spectrum just like hid lighting,its just tuned to be stronger in the labled spectrum.i would give em a shot.but if it was me i would not use just one color,i would do 2 or 3 6500k and toss a few 5000k in there as well,thats just how i run my plants

I wouldnt go all the way to 6500 personally, Id try 5000 first. Im going to use the sinks Robin sent me to build a bar using 4 4000k 3590s on a hlg-320-1750b. Prolly gonna add one of the 4000k citizen 36v cobs I just ordered to soak up the rest of the V available.

I'm still waiting to see a 6500k flowering run. I would love to see it.

I'll be flowering under Starlite 320w cobs in 5000k, day 1 24 hr dark.

thetr33man said:

I wouldnt go all the way to 6500 personally, Id try 5000 first. Im going to use the sinks Robin sent me to build a bar using 4 4000k 3590s on a hlg-320-1750b. Prolly gonna add one of the 4000k citizen 36v cobs I just ordered to soak up the rest of the V available.

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I'm using 4-4000k cxb3070"s on the sinks Robin sent ME for a veg light on hlg185-1400 hahaha

For typical white phosphor cobs using royal blue diodes, I suggest not going higher than 5000k as a standalone. As you move into higher CCT ranges the royal blue becomes the dominant wavelength and way overbalanced. The higher temps like 6500k are better suited in combos such as apache red\white.

Fluoros are fundamentally different because the light starts out in the uv range.