Maybe you can check the type of driver they use, modes, springs quality and switch quality?
You may compare your L4 with the review below and you should be able to tell. 
Since I have got both fake and not fake S2+ red flashlights from GB, I can tell that with the fake ones, I got the normal crappy box, just some paper around the flashlight. With the real ones I got today, and the real ones direct from Simon, the red one has a gift box with it.
The black and gray has not, but Simon put a sticker on telling what kind of flashlight is it.
As i mentioned already in the S2+ thread, the Convoy gift box is no more a indicator.
This is what i got:
But atleast no sticker from Convoy with the modelname or bin.
Looks real to me.
They are learning, maybe from here!
Now a good spring on the driver, but only a 1A driver.
Wonder if the driver has an Atmel chip?
My genuine one also did not come with the typical model/bin number sticker on the gift box, only the dealer barcode sticker like yours.
For me… is doubtful.
And more doubts… To be or not to be…
From the first it looks real. Are you saying it has an aluminium pill?
Marc
Yes, aluminium pill and rings. Plus the aluminium switch and general bad quality. If u own real Convoy lights, its obvious on the first sight.
Here is one of my three I got from GB yesterday, and they see out like the real deal, but you good people can decide:
All my boxes has the same white sticker with the same SKU number on it.
Yes!!! This is very good.
This label has same SKU number but the date is one earlier month.
And… this driver has not eight 7135…
You do have the ‘Convoy’ sticker as well, on the side of the cover.
Will have to dig up mine to see, I had the impression the gift boxes came without that sticker.
Checked them all, here is the pictures, so they are all real.
This one? On the box?
No - The little one on the end is the Convoy sticker. (S2+ T6-4C *8)
Also - Look at the 90° layout of the 7135 chips - That’s real. - The fake ones are not laid out at 90°.
Ken - Your’s are all real!
-Chuck
Tnx, finally GB is sorting things out. I’m really waiting for my Convoy C8’s, hope they are real also. I ordered some more today on their flash sale, of the new type. But I’m sure GB will sort things out if there is something wrong with the C8’s. Of a reason I don’t understand, they is sent as unregistered mail (two packages) still the price was over the limit, so I got free tracking. But no, they sent them unregistered. So can’t know where they are and when I get them.
My convoy s2+ GEARBEST
I received a fake red S2+ a few weeks ago and have two more S2+’s on the way. Haven’t sent a complaint about the first one to Gearbest yet but they claim the two en route are real. I’m kickin back to see what shows up on the slow boat. It’s actually kinda nice to see a Chinese company trying to make things right!!! I tried to get a different company to help me with a couple fake Hugsby Xp-1’s they sent me but that didn’t workout so well. Apparently I have the new improved XP-1’s that kick out around 30 angry blue lumens!!!
Gearbest came through and made things right. I received the replacement Red S2+ this morning and it’s the real deal this time. Convoy gift box, lubed threads, GID o-ring, LED centered, 4C tint, stainless switch, brass pill and ring. Sticker dated 15.07.17
The wife could even notice the difference in the weight from the brass pill. The laser etching is much cleaner too. The counterfeit has a little orange to it’s tint when compared to the real Convoy.
I’m Happy for You!
Way to go, Gearbest!
Thanks!
-Chuck
My wife has a sharper eye than I do since she saw the red tint difference.
I’m so pumped up waiting for the release of the Blue S2, I can’t wait to have my own S2.