De-doming Nichia 519A (I've perfected my method!) 

To those curious about the first two cross slices: They breaks most of the dome-glass adhesion. You can feel and sees it. As you slice down to the glass, you can see the boundary between the glass and the dome turned from invisible to silvery/glassy. The phosphor color also turned warmer. You can feel a very subtle "crackle" in your fingers. Note: to check if the glass dome still adheres to the phosphor my trick is to lit the LED at very low current then inspect it under a magnifying glass using a welder glass or very dark sunglasses. If you see any darker area that means air gap, and you don't want it. Sometimes it's so abvious you can see it with aspheric lenses positioned in focus in the white wall. Everytime there's a sudden change in medium refraction index, the light bounce back more than if the transition is smooth. That's the idea why most LEDS are domed. Coating the dedomed glass with multiple layer of optical grade silicone with gradual refractive index (between the glass and air) will lessen the output loss. You can also reduce rosiness this way. Edit: to clean the remaining silicone remnants, I dipped a cotton bud in cajuputi oil. A very light rub no residue. Cajuputi oil is very mild (compared to kerosene or gasoline) and evaporates fast even if you forget to wipe it dry. This has been a proven trick used by many smartphone repair shops in my country.

Surgeon pinpoint precision, fantastic work sir 🫡👊

Brilliant video. I'm still new to the flashlight world but I think this would be fun to try out. Thanks for doing this on camera for us

Fun to see how people learn over time. Now they just shove it off with a cut off cotton swab. I've heard people mention doing it while installed too and turning the light on to heat the adhesive up a bit before sliding it off

Good tips, I need to get some more ordered I in different tints.

yours truly, chooly

What do the cross cuts accomplish? Shouldnt the action of the 45 degree cut and horizontal force be all thats necessary in order to lift the dome off the emitter? I dont understand what role the cross cuts play and im just trying to learn. I was able to successfully dedome one using gentle horizontal pressure with my fine tweezers and it turned out very clean. (Im aware its a lot more risky that way but i didnt want to take the pcb out of the light again after testing it with the dome on.) Also im not sure if you have heard this already but I found that cutting a q tip in half and using the hard nub was awesome for removing the excess dome material without damaging the emitter.

Not sure if you're currently using one but a macro lens will help you get some super close footage

Thanks for this. Successful dedomed mine using this method. Quick question, is it safe to reflow dedomed versions? I'm afraid of damaging them when doing the transfer since you mentioned that the base under the glass is soft material.

I would like to look at the difference of the one with a dome and the one without. is there a big difference? THANKS

Do you do work like this on commission? I want to do an emitter swap on an s2r baton ii, but don't have the skills myself.

What's the point with de-doming? Better heat dissipation? Why to do it risking damage of the LED?

Are these ever sat on cree xp pcb's? Just got order from Convoy and when I unscrewed the plug it said "Cree XP"

What does the dome do? And why would you want to remove it?

Is there any change in lumen by dedom led?

Can you explain how dedomed leds differ from domed ones? Thx

What sort of cct reduction are you getting with the dedome?

Nice video. Wish they’d just sell them with out the dome.

No test after de-doming?

lol i did this by accident to my astrolux ec03 lol i somehow ripped off the dome sulfer jell pat of the leds and still work but now there blue leds instead of white lol so now i have a brand new ec03 flashlight with blue leds lol i was so mad when i did that i was trying to put the bessel back on and somehow it ripped the dome sulfer part off by accident and i want trying to do what your doing thats for sure but owell a brand new 70 dollars flashlight ruined so im going to try and buy some leds to repace these ones but i dont like taking apart the flahlight becuase there not easy to put back without ruining something lol but will see how it goes

lol man im way to shaky to do stuff like this lol i can barely solder because i shack so bad lol