Imalent RT90 (2021) review

Luminus SBT90.2 LED
4800 lm output
427980 cd intensity
4 x 18650 Li-Ion batteries

The Imalent RT90 (RT90) released in 2021. It uses Luminus SBT90.2 LED, SMO reflector and 4 x 18650 Li-Ion batteries. The powerful emitter in this flashlight provides up to 4800 lm output, 427980 cd intensity, and a beam distance of 1308 m.

This light has 5 modes of lighting. The memory function is a nice feature, the light will remember the last used mode. The RT90 flashlight is rechargeable easily via USB port.

Table of contents:

Imalent RT90 (RT90) specifications

Rated 4/5 based on 813 user votes.


The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive finish.

Weight428 g
Length127.5 mm
Body diameter51 mm
Head diameter65 mm
Materialaluminium alloy with HAIII hard-anodized finish


The emitter of RT90 manufactured by Luminus, a US-based LED manufacturer. The RT90 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better. It has an AR coated lens.

EmitterLuminus SBT90.2 LED
Color temperature6500 K
Lenstoughtened AR coated glass
Switchelectronic side


The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.

Flux4800 lm
Intensity427980 cd
Throw1308 m
CD/LM factor89.16


The RT90 has mode memory. Mode memory means that the light will remember the mode you were using when the light was last turned off, and when you turn it on again.

Modes5 modes
Mode memoryyes
Ramping modeno


The battery indicator lets you know when the battery is low, charging, or fully charged. This flashlight can charge the battery with an integrated charger, and it works with any USB power source. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating.

Battery4 x 18650 Li-Ion batteries
Battery indicatoryes
Charger portmagnetic USB
Thermal regulationyes
Impact resistance1.5 m


The package includes a holster to safely store your flashlight. The lanyard prevents accidental loss of the flashlight.

Package contents2 x spare o-rings
magnetic USB charger cable
nylon holster

The performance of the Imalent RT90 flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

The specifications above are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Imalent RT90, then don’t hesite and signal the problem to us.

Imalent RT90 (RT90) pictures

Imalent RT90 / RT90 photo Imalent RT90 / RT90 photo Imalent RT90 / RT90 photo Imalent RT90 / RT90 photo Imalent RT90 / RT90 photo
Imalent RT90 / RT90

Imalent RT90 (RT90) comparisons

According to our statistics, the Imalent RT90 flashlight was most often compared on our site with the following flashlights.

Imalent RT90
Imalent RT90
vs Sofirn Q8 Plus
Sofirn Q8 Plus
Imalent RT90
Imalent RT90
vs Fireflies T9R SBT90.2
Fireflies T9R SBT90.2

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