Sst-40 dedomed in Toluene
Sst-40 dedomed in Nitro thinner
To me it seems like the one done in Toluene has less silicone left on the phosphorus.
Hmm… I swapped the LEDs between the two hosts because I had a better driver in the one that has green tint. Guess what happened? The perfect white sst-40 is now green and the other one now has no green in it…
I don’t understand a thing… Could it be the driver that causes the tint shift? That’s the only explanation I have now.
One of the driver is a FET only with PWM and that one is the one that don’t have the tint shift.
LEDs ran on PWM will always display their tint at their maximum current IIRC, because of how the PWM works… My SST-40 gives me a brilliant cool white with little green at max output, but at lower outputs on a non PWM driver, it gets rather green.
Just thinking out loud. I know that Mitko and 18sixfifty uses FET only drivers and coincidentally they are two of the members that have reported that they dedome without tint shift. Could it be that easy?
I wonder what kind of drivers giorgoskok uses?
Fet only drivers , but i don’t think that it is important .
Check your hosts , does the one that shows green tint has an AR coated lens ? What has the other ?
No, everything is the same, two identical hosts. Both have AR-lens and to be perfectly sure I tried them without reflector and lens. It made no difference. I’m quite positive that it is because of the FET only.
I’m using triple channel drivers and the tint is purply cool white. Your results are interesting. I’m watching to see what you determine…
I wonder if the type of PWM (phase-correct PWM -vs- fast PWM) matters. I seem to remember CC and TK mentioning it impacted moonlight. Maybe it impacts higher modes too?
What exactly is a triple channel driver?
I need more drivers to do more extensive testing. If anyone know somebody in Europe who can sell me high quality FET drivers please let me know!
impressive LED!
Good Job Djozz 
Your de doming results does not look to good friend. Lot of silicone residues remaining everywhere.
It seems like your nitro paint thinner and toluene gives absolutely same results
I still recommend that you stick to nitro paint thinner (the cleaning type that you can actually use to wash your hands and even face from paint if necessary) it is not dangerous at all comparing to toluene which is deadly poison
So far your de doming looks like good rookie attempt to proper de doming. Continue with good work and develop your methods :+1:
Would any one be willing to toluene dedome me one?
This story gets stranger by the hour…
A driver difference causing such a tint shift?
It’s actually hard to believe…
Ehh… Just so you know, Nitro thinner contains between 60-70% of Toluene. So no one should wash anything with it.
Besides that, I couldn’t care less about the silicone remains around the phosphorus. It doesn’t affect anything.
Edit: and rookie attempt? It’s not exactly rocket science we’re talking about. So if I leave it in for a bit longer that makes me a pro? Good to know!
Tell me about! But it’s the only plausible explanation. I swapped the LEDs again, this time in two other hosts. The results were the same.
Maybe true, but i’m not happy when there are still bits of silicone on the die either.
If there’s still some on the die, the LED goes back into the hot solvent (not toluene, i’m waiting for that to arrive from Germany, i will use that at room temperature, not around 100°C like i do with car fuel or mixtures)
Sure, I could have left it in longer, but I didn’t want to risk that the die got loose again, so I stopped there. And when the tint came out the way it did I was more than happy!
Could also be the lens.
Does one of your lights have an AR-coated lens. I have some Olights whose AR coating would turn any tint green.
It’s not the lens. They have the same lens and I’ve even swapped them with each other. Still the same result.
Ordered Sunday 10-1 at my door Tuesday 10-3 now that was FAST! 
And it was packed very well! 
:+1:
