Review: Nitecore SRT7GT (Tactical, Rotating Ring, Multicolor, XP-L Hi, 1x18650)

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Review: Nitecore SRT7GT (Tactical, Rotating Ring, Multicolor, XP-L Hi, 1x18650)

Due to severe time limitations, this review is published with a reduced amount of writing, pics, data.

I received the SRT7GT from Nitecore for the review.
The SRT7GT is a tactical flashlight with a peculiar rotating ring and several emitters. The rotating ring allows you to select which emitter will be powered: a 5 mm red LED, a 5 mm blue LED, a 5 mm green LED, a 5 mm UV LED or the main XP-L Hi emitter (with infinite output regulation, ie, the more you rotate the ring, the more light will produce).

The SRT7GT, a medium sized tactical 18650 light (158 × 40 mm, 175 grams).

Here you can see the 4 5 mm LEDs and the XP-L Hi at the center of the smooth reflector.

The light is turned on and off by the mechanical switch at the head. It protrudes, so the light doesn’t tailstand.

And at the reach of your thumb and index finger, the rotating ring

Here I rely on a well made Nitecore pic to describe the operation of the ring

The ring is easy to rotate, and at every “position”, there is a tactile feedback from the ring (a nice click).

When the SRT7GT is in the Standby mode, the small blue LED at the head will briefly flash with dim brightness (an alternative to the classic beacon, where the main XP-L Hi LED will flash with full power); it will also flash as the battery charge gets lower.

Good quality cordura holster from Nitecore, with MOLLE capability and belt loop.

The 5 mm UV LED does actually a decent job in providing some light from the UV spectra without producing too much purple light in the visible spectra, there’s just a bit of purple (but don’t expect the performance of a big UV LED paired with a UV filter that is present on dedicated UV lights). It does its job in helping seeing the UV reactive elements without submerging the object you are lighting with purple light.

The body has a good thickness, at the head the threads are square cut and there’s room for large batteries.

At the head there’s Nitecore Trademark Inversion polarity system, paired with a spring that allows the light to work even when sustaining recoil or hits.

At the tailcap the threads are anodized, allowing physical lockout


I don’t own the MH27 anymore, but to me it feels like the output and the beam of the colored LEDs is overall improved. However, the new camera doesn’t cope too well with the colored lights, from my phone the autofocus seemed fine.

Output and Runtime
Since the SRT7GT has no precise level, I tested the max output and a lower brightness, around 40%.

As far as the colored emitters’ output, I can tell that the brightest to my eye is the blue one, then the green, and finally the red.
I tried the max output also with an IMR cell, without getting relevant increase in brightness.
My thoughts
The SRT7GT is well built and finished.
The SRT7GT manages to maintain a compact form factor for a tactical 18650 light, with good throw, multi colored emitters with decent output and beam-color (even for the UV one), and the rotating ring.
The rotating ring is well realized: not only it is easy to find and rotate, with clear feedback at each “stop”, but it also rotates with a good radius for the “infinite output” adjustment part.
Regulation is good at the tested levels.
Being a civilian, I would have liked that instead of the alternating red and blue strobe (which use will lead you into troubles if you are not, like me, a Police officer), the SRT7GT had a red strobe (useful in danger situation, like to signal your presence when your car breaks down in the middle of the road); but I get that the SRT7GT has a more tactical market target.
I’d like to see the SRT7GT come with a NW tint.

Thanks to AntoLed for the Camera help and the luxmeter.

All my reviews, in italian and english, here: