Bikight GT13PLUS brief review: fine throw and flood combination, within 100 meters.

Main LED: Samsung LH351D: crazy bright, the reflector is optimal.
Side leds:
White, blue, and red are very bright, you cannot see in, hurt your eyes.
UV led is weak, despite useable by banknote controll.

The switch is optimal, dont click on inside your pocket.

Pros: very lightweigt, well built, good memory mode by the main Samsung LED. Side lights has no memory, but are work well.
The illuminates steps are perfect. Main LED: Moonlight, low, medium, high, and blinking. No pwm noise, only hear it next by ear.
The GT 13 plus main LED is a bit stronger as a Convoy S2plus (with a CreeXML2-U2, 8x7135). Usb-c charging is fast. The GT13PLUS are real 1000 lumens. Nice cromatic for my eyes. Strong magnet on end.

Cons: the main LED temperature on high is 51 degree Celsius within a minute. The heat dissipation is not so good without a metal body. My advise: dont use the flashlight main LED on highest , only 2 minutes maximum, above 10 Celsius ambient temperature, else you can bake the LED. See my thermal images.

Overall: very very good quality, versatile light, I love it. I didn't expect much for this price but GT13plus beat the Convoy S2. Stronger, lighter, smaller.
In small body its huge power, and lightweigt as a feather. Worth the money.
Insane LIGHTWEIGT, unbelievable. I use it with headband for work. Thanks Banggood.

Excellent light, ever so slightly bigger than a key light, but very easily carried in any pocket or on a hat brim as a head light with the included clip. Last one I ordered came with a silicon diffuser. It is identical to the GT13 Plus in all its features and LEDs with the exception of a smaller battery with half the capacity, but still a very respectable 500mah. This very thing makes the GT13 better than the Plus, since the smaller housing is much more manageable.
Operation is simple and intuitive. Long press for Turbo - 1000 lumens. Obviously it is not meant to work all day at these level, heat from the driver will rise and cannot dissipate to the body (plastic), so this is a clever failsafe. Double click turns the emitter on and then you can use single click to cycle through the levels, Eco (10lm) - Low (50lm) - Mid (180lm) - High (700lm) - Strobe. Hold for OFF. Triple click will turn on the Aux lights and you can advance between them with a single click, again. Hold for OFF.
Check the photos with the GT13 and the Jetbeam mini One SE for comparison.
Hands down the best and brightest keylight I own, Astrolux K2, Lumintop Frog included.