hi guys… just received these lights… both are awesome but strangely Sky Ray S6 has 4 modes low-medium-high- strobe
and Sky Ray king has only 3 mode high - low ( hidden strobe)
although they are similar in appearance ( think of it as sky ray S6 is half of SRK size)
as far as my eyes can see… i think Sky Ray S6 is little bit brighter…
all the lights has fresh charges
let’s see if this pics works…
wall shot between sky ray king on the left… sky ray s6 in the middle and C8 on the right
this is what my bike light is going to be 
2 throwers and 1 flooder
I almost bought the S6 before I read the abysmal MTBR reviews. This light could have been such an awesome smash hit had they just followed the recipe for what made the king such a great reliable inexpensive light… mainly the driver.
Now Im building a 9 x 18650 parallel pack for my king to run parallel with the 4 others that the light already holds (13 total). As long as its mounted to a moving bike, the king does not get that hot when ran continuously in high mode. I have about 150 complete discharge cycles on mine while ridding (always in high mode) and cant believe what a reliable bargain its been.
Since I often travel great distances at night (and often in complete wooded darkness) I believe in redundancy. I carry a pair of C8 XML’s on bar mounts with a few extra 18650’s in the tail bag… just in case
It doesn't really surprise me that the S6 is brighter, but it doesn't interest me much either. That's because I care more about how the light runs at a fraction of maximum output, and the fractions of light output (modes) are set horribly thanks to a bad driver. The battery sucks too.
Daylighter, thanks for posting up. As SkyPilot mentioned, the S6 was pretty much universally panned on MTBR, and leaftye and me were contributors to that thread along with a few other BLF members. Bulky size, non standard plugs, crappy mount and modes being determined by # of LEDs vs output is bad but I could live with those faults. The terrible battery is what really bothers me - 1-1.5 hours run time with declining output makes this light useless for it's intended purpose. I'd love to hear your impressions on run time when you get a chance.
I have sent an email complaint to CNQG/FancyFlashlights laying all the issues out to them, but they have chosen not to respond. A crappy design is my fault for buying - you win some, you lose some in the budget light game. But including an obviously bad battery pack is all on them. To get a good replacement pack will cost 2/3 or more of the price of this light. I have pretty much decided not to invest any more funds on this light.
I have come to expect Quality from CN Quality, this light is not a good example for them.
unfortunately the battery only last around 1 hr on high, but that can be expected with light this caliber
more power = brighter = less longer time … they using 4400mah battery pack,( they have to cut corner somewhere)
think of it as 4 18650 2200mah batteries taped together… so if you want to last longer on the ride then you just have to get one of this bad boy
http://www.lt-box.com/high-capacity-10000mah-8-4v-4-26650-led-bike-light-battery-pack.html
as far as the heat… it virtually non existence… since i’m constantly moving anyway
no heat = no drop in lumens
i found out the medium setting is not much different in output compare to high… so i left it there to conserve battery
and since I usually ride less than 2 hrs at night this really is not a problem
unfortunately winter is coming… as the night getting colder so does the battery capacity getting shorter too
on high it last around 40 mins …
i usually carry XML t6 502b flashlight as back up light. it’s always been my fav flashlight to date… small and gives good output… enough to see the road ahead and to be noticed
http://www.ebay.com/itm/3in1-CREE-XML-XM-L-T6-LED-Headlamp-Headlight-Bicycle-Light-151-Flashlight-Torch-/160931235996?pt=LH_DefaultDomain_0&hash=item25783fc89c
but when all the lights are on high mode… i always get the double look from other cyclist or motorist.
just the other night at the traffic light, a driver in jeep cherokee had to take double look at my bike to see what kind of lights i’m using as it was 3 times brighter than his car headlight
That's still an assumption and subjective perception of light output. I'm not sure that it's much brighter than the comparable 3 XML bike light, but looks that way on the wall because it collimates light better thanks to the wider optics. I'd also think it has the same driver and draws the same power too, or 1.95A on high. Unfortunately no one has checked the current draw with this light, much less tested the OTF lumens or tested the battery with a hobby charger.
As you probably saw in the mtbr thread, I considered that 26650 battery pack, but opted against it because the quality of the cells are unknown and the vendor doesn't have a reputation. Either could be good or bad, but it wasn't willing to gamble again on this light. If you're willing to step up and buy that battery and do some testing, several of us sure would appreciate it.
will do some testing on how long it will last… fortunately for you… i like to gamble hehe
well… only one way to find out on how good those batteries are… but i’m betting that it will last a lot of longer than what sky ray s6 battery came with 
i bought sky ray s6 because i think i got a good deal on it… $62/free shipping
in fact since i’ve been lurking around this forum… i’d some good deals on flashlights too
been lucky to snatch some Sky ray king for $41 on black friday … got 2 of them
this new hobby of mine become so addicted… my wife though i was born somewhere in dark cave :Sp
i have to remind her… just in case another hurricane bitch decide to pound the east coast again… we’re ready!
unfortunately for me…i lost one of my favorite “1800 lumens” zoomable flashlight during black out while volunteering at one of the hurricane sandy relief center.
we had the center open using flashlights everynight… unfortunately for me, one of the poor soul like my flashlight so much… decided keep it to themselves even though they have no way to charge them during black out
( they probably didn’t even know it wasn’t running on regular battery)
it probably was one of my memorable moment… everything was so dark, you can’t see few feet ahead of you
and here i am with very bright flashlights shining the way… 0:)
Someone just posted the current draw for the S6 in the mtbr thread.
I do think the 4x26650 will last longer than the S6 battery, but that's not saying much. Every indication is that the S6 battery has about half the capacity it's supposed to have. The 4x26650 should have around 8000 mah if it has decent cells. It may be around 6000 mah if it uses recycled cells, and while this is still good, it could be dangerous if the cells are poorly matched.
Thanks, Daylighter. That confirms my run time experience and I tested mine at room temperature, so you are right that it's only going to get worse in cold weather riding. I can also confirm there's really not much point in running the light in high mode since it's not appreciably brighter than medium. The current draws posted over at MTBR confirm this. You should get 20-30 minutes more run time by keeping it on medium.