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Which Violet To Use?


AlanM

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LEDgroupbuy has 430nm and 405nm violets which run at 500mA and about 340mW of radiation, stevesleds has one that he says is a 422nm and runs at 700mA and 760mW of radiation. Not sure about the others. The full spectrum thread here says there's a chlorophyll a peak at 417 and another at 425. What are the opinions of the full spectrum gurus here? Get a little of each if I'm ordering from both places?

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I see the latest trend is using multiple violet spectrums (or wanting to use them), but at this point I am not sure how necessary it would be. I have not tried this myself either. I would think that the violet diode from Steve's would actually hit both chlorophyll A peaks to a degree, plus it can be run higher....

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I would think that the violet diode from Steve's would actually hit both chlorophyll A peaks to a degree, plus it can be run higher....

^this

 

Plus I've heard of several people that claimed the lenses turned brown on their TV's from ledgroupbuy. Steve's violets with a higher output seem like a safer bet, and more efficient.

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Milad LEDGroupBuy.com

I see the latest trend is using multiple violet spectrums (or wanting to use them), but at this point I am not sure how necessary it would be. I have not tried this myself either. I would think that the violet diode from Steve's would actually hit both chlorophyll A peaks to a degree, plus it can be run higher....

Actually the Hyper Violet hits it much harder on the main peak. Intensity doesn't matter when its in the wrong area. It also taps on the Chlorophyll b's first peak.

See below:

hv-spectrum.jpg

 

We did have some issues on the lens of the early version of the 405nm when ran close to 700mA which ended up overheating the lens. All fixed now with the new solderless versions. Better heat dissipation and can be ran up to 700mA.

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This pic is helpful. I didn't realize how wide the peak was.

 

Do the tails on the solderless versions mess up the layout on the Makersled heatsinks? I'd think they would get in the way, but even if they did, the lack of soldering and the flexibility with optics (I think I read you saying that the XTE optics will fit?) makes them nice.

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We did have some issues on the lens of the early version of the 405nm when ran close to 700mA which ended up overheating the lens. All fixed now with the new solderless versions. Better heat dissipation and can be ran up to 700mA.

Good to hear. It also makes them much easier to mix when they can all be run at 700mA.

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Milad LEDGroupBuy.com

This pic is helpful. I didn't realize how wide the peak was.

 

Do the tails on the solderless versions mess up the layout on the Makersled heatsinks? I'd think they would get in the way, but even if they did, the lack of soldering and the flexibility with optics (I think I read you saying that the XTE optics will fit?) makes them nice.

this new one has a wide peak instead of a harsh peak at 430. Its actually more of a 425-430. Blends nicely into the Royals.

The tail is really small. It actually promotes some interesting layouts. Ill snap some pictures. XTE optics fit nicely

 

Good to hear. It also makes them much easier to mix when they can all be run at 700mA.

Yup, that was the goal, get everything at 700mA so they are ready for something that is coming soon

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Should have asked this in the first question, but for the full-spectrum builds shown here. Would you consider the HV and the TV basically interchangeable?

 

From the graph you posted it looks like the HV is really what you'd want and not the lower wavelength TV, but all of the full spectrum layouts just refer to TV.

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Milad LEDGroupBuy.com

FYI also

The 430nm is the highest power rated that I have seen. It goes up to anywhere between 880-960mW @ 700mA

 

Here is some snap shots

WP_20121228_002.jpg

WP_20121228_003.jpg



Should have asked this in the first question, but for the full-spectrum builds shown here. Would you consider the HV and the TV basically interchangeable?

 

From the graph you posted it looks like the HV is really what you'd want and not the lower wavelength TV, but all of the full spectrum layouts just refer to TV.

I dont have enough data to answer that yet

Right now in my builds since the 405nm has been doing so well, i just do half and half. So if the build calls for 12 TVs, then I just do about 6 405 and 6 430. Just not enough testing to suggest the 430 is better yet.

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Actually the Hyper Violet hits it much harder on the main peak. Intensity doesn't matter when its in the wrong area. It also taps on the Chlorophyll b's first peak.

See below:

hv-spectrum.jpg

 

We did have some issues on the lens of the early version of the 405nm when ran close to 700mA which ended up overheating the lens. All fixed now with the new solderless versions. Better heat dissipation and can be ran up to 700mA.

Not sure how the HV "hits much harder" on Chlorophyll A's than Steve's Violet - your vertical scale is cut off, and I have nothing to compare it to (graph-wise) with the Violet that Steve's sells. If anything, it appears that they are probably quite similar - not a bad thing, nor a negative comment, just an observation.

 

It is good to see that you have upped the power rating to match other diodes...

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Milad LEDGroupBuy.com

Not sure how the HV "hits much harder" on Chlorophyll A's than Steve's Violet - your vertical scale is cut off, and I have nothing to compare it to (graph-wise) with the Violet that Steve's sells. If anything, it appears that they are probably quite similar - not a bad thing, nor a negative comment, just an observation.

 

It is good to see that you have upped the power rating to match other diodes...

Power rating has never changed. The ratings we publish are all @ 350mA, however when people quote them they leave the 350mA out and compare them to others that post their ratings at 700mA which is twice the power. So we have the 700mA ratings up so you can compare apples to apples.

 

It hits harder because its hitting its peak rather than slightly off the peak.

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