The measurement of lumens—which represents the entire amount of light that a light source produces—must be done correctly using an integrating sphere. Lumens do not accurately describe the brightness of a spotlight from flashlights.
Given that a flashlight utilizes a lens to concentrate all of the light it produces in one direction, measuring light from a flashlight in lumens is actually not the ideal method. Depending on the shape of the lens and the strength of the light source, the spotlight's brightness and the focused point will vary from one flashlight to the next.
The brightness of the spotlight you perceive includes a mix of the lens or reflector and the total lumens produced from the light source when comparing flashlights (typically an LED). If the lens or reflector concentrates more of the overall light into a smaller spot, a flashlight with fewer lumens may have a stronger spotlight than a flashlight with more lumens.
Without a reflector or lens, a 1000-lumen flashlight may illuminate an entire room like a lantern, but it cannot cast light over a great distance. A small, spherical "hotspot" of light would be thrown on the wall of the same room by the exact same flashlight, whether it had a lens or reflector. The spotlight would be brilliant, while it won't be able to light up the rest of the room that's not covered by the shallow beam.
The flashlight without a reflector or lens might perform better in close-up circumstances, but the model with one or both would perform significantly better from a distance. Therefore, don't just base your flashlight purchase on lumens. Your need to consider both lumens and lens/reflector while choosing the ideal flashlight.