Just got this light. It worked great for more than a day. And now, it goes from the 35 lumen mode to the 1600. It’s stuck there. So it goes on…35 lumens…click…1600…click…1600…click…1600…click…off. The memory works, but only in those two modes.
Any ideas?
I thought I would really love this light. Feels good in the hand and has the name of quality, but it’s just a more pointy than normal flooder.
I had it on the 1600 lumen level, and now it just dropped down to the 35 lumen level after about 45 seconds. The head is not warm at all.
Any input is appreciated.
Your best bet is to contact the supplier and/or the manufacturer, if the issue is not readily resolvable via checking on the usual checkpoints.
I have a TK75 2015 that is heavily modified: Different leds, different driver; works great.
How many days you bought this?
You should ask for guarantee with the store if this bought recently or get a refund (I think its better choice)….
If you get a refund, I think the tn40 is a better choice 
Well, charging the batteries fixed my problem. But what others have said is sure true—this thing eats batteries! Gotta watch it.
I’ve got the 3 emitter 2900 lumen version. It does really well as far as battery life on Panasonic 3400 mAh unprotected cells. I should do an actual runtime test and compare it to the new 2015 4 emitter version some of you guys have.