When talking about flashlights, we often wonder about the difference between different brands and models. Priority should be given to focusing on the power, autonomy, lighting distance ratio. When choosing a flashlight, we often look at the power, but it should be noted that the greater it is, the shorter the autonomy will be and vice versa. I propose a comparison of flashlights from three different brands in an equivalent price range.
Summary:

Maximum lighting distance: 241 m
Maximum light intensity: 1060 lumens
Maximum autonomy: 145h
Two light intensities (17, 302 lm)
Flashing mode (1060 lm)
Waterproof rating: IPX-8 standard
Price: $77.49 incl. tax
Battery: 18650 Li-ion
The Klarus brand is a new brand of very high quality flashlights.
With a power of 302 Lumens and an autonomy of 6.2 hours in medium use, the Klarus XT11 positions itself as one of the best tactical flashlights thanks to its power / autonomy / distance quality, all at an affordable price.
The IPX-8 standard allows you to use it during interventions in wet areas.
Drop resistance from a height of 1 meter provides you with additional safety.
It is rechargeable via USB or powered by two Lithium CR123A 3V batteries.
Low: 17 Lumens (145h)
Medium: 302 Lumens (6h)
Turbo: 1060 Lumens ANSI (3h)
Strobe mode: 1060 Lumens (7h)
Advantages:
USB Rechargeable
4 light modes
IPX-8 standard protection
Disadvantages:
Battery charger sold separately
Non-magnetic USB cable sold separately

Maximum lighting distance: 200 m
Maximum light intensity: 1000 lumens
Maximum autonomy: 140h
Waterproof rating: IPX-8 standard
Price: $78.99 incl. tax
Battery: 18650 Li-ion
Fenix confirms its reputation in the survival world with this tactical flashlight.
With a power of 200 Lumens and an autonomy of 8 h 30 in medium use, the Fenix PD35 Tac ranks, alongside the Klarus, among the best tactical flashlights on the market in this price range. It has great autonomy even at high power. It can be used in any situation thanks to its five power levels and strobe mode. It has an intelligence that remembers the last mode used.
Eco: 8 lumens (140h)
Low: 60 Lumens (29h)
Medium: 200 Lumens (8h30)
High: 500 Lumens (2h55)
Turbo: 1000 Lumens (1h10)
Advantages:
Mode selection with a simple button
Power and autonomy ratio
5 power levels
Disadvantages:
It generates heat
Batteries not included
Battery charger not included

Lighting distance: 50 to 240 m
Maximum light intensity: 420 lumens
Maximum autonomy: 15h
Waterproof rating: IPX-4 standard
Price: $84.90 incl. tax
Battery: 14500 3.7 V
The Led Lenser brand is a German manufacturer of LED lighting products.
With a power of 420 lumens and an autonomy of three hours in heavy use, the Led Lenser P5R flashlight does not rank in the tactical flashlight category, but it remains a very good flashlight thanks to the three lighting modes eco, turbo and strobe. It is equipped with the AFS system that allows it to seamlessly transition from a uniform proximity light to a very concentrated long-range light.
Eco: 20 lumens (15h)
Turbo: 420 lumens (3h)
Advantages:
AFS System
Rechargeable battery
Focus Lock
3 lighting modes
Disadvantages:
Price slightly higher than the other two models
Before choosing the most powerful flashlight, you must first consider what you need and the power supply method in order to limit operating costs.
Do you want to use it for professional or home use?
Should the brightness be adjustable or fixed?
Weight and size also play an important role in your choice.
If you want to use them for mountain outings, it's better to have long duration at medium power than short at high power. Headlamps with strobe are useful both for outings and for joggers.
Current offers are vast regardless of your budget and you can undoubtedly find the flashlight of your dreams.