Interesting, and very valid point Jim.
However, the perceived brightness from 1700 lumens and 2200 lumens is barely distinguishable. It is a good point though.
It’s an idea for almost any flashlight in the market if you want to make it a headlamp or bike lamp or put a handle on the plate - tail cap and make it like a olight 6
I already made this for my TrustFire TR-3T6 and it works with any bike battery pack (8,4 V)
For Apex 5t6 or Sky Ray King you have to make different pack (4,2V) or use the body of the flashlight.
When you want your flashlight again you just unscrew the head lamp and put it in the flashlight original body.
I order the plate - tail cap to someone with lathe and it cost me 10 euro and of course you have to put the cable and switch and find a way to connect with (+) on head lamp (it’s should be easy for guys like you)
The dimension of Apex 5t6 headlamp are the same with Sky Ray s6 but with better light.
You can use your Apex 5t6 on medium or low when you are riding and on high when you want to get crazy 
I took the idea from this product :
Maybe a good idea for RIC
We're glad that you joined, jlogres!
So are these your new ways of welcoming people?
Hi Jim! Welcome to BLF! You'll love being here! :)
Good point, I'll try to take that into account in my future reviews.
Bingo! ;)
Glad to be here as a member and not just as a reader … tnx for considering my opinion
Is there a chance that the tail cap fit exactly to the head lamp ?
I mean can you screw the tail cap to the head lamp without the battery body, with or without the switch plate ?
I know … strange question
It doesn’t. Sorry.
Tail cap thread diameter is too small. 
Ok the
Thanks a lot for your time
I wasnt very impressed with my apex 5t6 from CPF but it is my first multi-emmiter and first big format torch.
My light is very focused with not much spill like I have seen in other pictures but I did choose the warmer colour option. At least it runs for about 4 hours on a set of batteries but that isnt why I bought it.
When I test it with my cheap multimeter I was getting 3a max dropping to nearly two once the batteries settle to 3.8v. So cpf sent me a new driver with a beefier looking coil but it doesnt seem to have changed the draw. Could the leds be duff?
Anyway if anyone wants to try and replace the driver with out taking the pain in the backside front ring off heres how I did mine with a picture. Iv busted both my hands before and didnt have the grip to turn it.
Drilled a hole where I guessed no components would be using the new one as reference (might not work if your driver is very different). Screwed in a long slim self tapping screw, grabbed it with the cutter on my pliers and levered down on the torch head. It was glued but once it popped came right out.
Cleared off the old glue and filed new driver board round as it had lumps on the edge. Glued back in with heatsink white plaster. 
I finally made my APEX 5T6 Bike light project .
I believe that you will find it interesting.
Hi, could you tell me the size of these tiny reflectors?.
Regards.
they are 15.55mm height and 21.9mm diameter, any other measurement needed, pr is it enough with these? (it has a groove in the bottom)
Thank you very much.
I asket it because I’d like to change on of them on my apex (which I have glued with threadlocker, that’s why I asked, i didn’t want to re apply it for nothing) with one of these XML optic, they are Diameter: 21.2mm Height: 13mm.
http://www.intl-outdoor.com/2-pcs-cree-xml-led-optic-10-degrees-p-474.html
the diameter seems ok, but looks like the height is a bit shorter
i bought all 5-packs of lenses from fasttech, to experiment with the angles (15, 30, 45, 60, 90 and 120, there is not 10 degree in fasttech) they are the same size the one you linked.
they should arrive this or next week, so if you want to wait a little i will let you know the results and if i did manage to install them (i was planning to remove the front glass, as i don’t need a watertight light, and make a plate with five holes to fit the lenses… lets see if it works)
thank you very much, I’d like to replace one or two reflectors with optics with a tight angle of emission, this light is too much flood for me.
i didn’t read it correctly the first time, i think its not a problem if they are short, you can make some piece to put in there, i have the problem because thoe tir lenses i bought are bigger, so i have to remove the front galss
What a pity, let me know anyway how it ends.
I think this is the same thing as this one from Lightmalls.
King Flavors from LightMalls”
Curious about this:
http://www.lightmalls.com/sky-ray-k107-3t6-3800-lumen-3xcree-xm-l-u2-5-mode-memory-led-flashlight-2x18650-2x26650