Are you in New York? I have a spare carclo, but my sapphire lenses from Neal are somewhere between here and China. They appear to be in the US but are doing the shipping partner shuffle.
MTN sells the Carclo in the US, but I don’t see a link for the front lens.
Default thermal stepdown is 55°C or 60°C (I can’t remember which).
It can’t measure how hot the optic and glass lens gets, it just measures the flashlight body (temp sensor built into the MCU of the driver). Normally the optic and lens don’t get very hot. The plastic that Carclo uses is good for about 120°C. If you leave the light face down on a dark table (it may not have to be that dark) you get a lot of heat absorption into the table. This heat is then trapped. You create a little oven with the optic and lens inside. As the air is sealed off, the temps get higher and higher and they get damaged.
I don't think it's glass. I read an FW3A update about switching to an all in one different vendor's optics that didn't use a glass window.
Perhaps this lens is one of those :shrug: I'm waiting for a response to my email to Neal.
Edit: I just checked the Light Blond wood it was set down on, Triangular blackened burn marks etched into the wood. Yikes. I think I'll mill
some crenulations into the bezel so I can see if it's on.
I did this to my light, showing off its burning capabilities… In my case the singe on the lens scared me at first… But it cleaned right off - it wasn’t the lens material, rather a deposit from whatever I was vaporizing over and over……
The SST-20s that Lumintop are using are divine. So are the 219Cs to be honest. Not a visible hint of green to me, and I’m quite sensitive about tint.
As for the futureelectronics site, unfortunately it seems that there are some quite high minimum order quantities. I’m also in the UK and wish to buy a selection of different optics to try out. I need to remember to check out Arrow and Mouser to see if they will allow me to purchase single units without prohibitively expensive shipping.