More infrared range can make a nearby scene worse
Built-in infrared LEDs illuminate whatever is closest first. A wall, soffit, railing, spider web, raindrop, or insect can reflect enough light to force the exposure down and leave the actual subject dark. Through-window use is especially problematic because the glass reflects the LEDs back into the lens. Repositioning the camera or separating the illuminator often improves the image more than buying a model with a larger advertised infrared distance.
Sharp identification needs light and shutter speed
A bright-looking frame can still blur a walking person or vehicle when the camera lengthens exposure. Resolution cannot recover motion detail that the shutter never captured. For identification, judge face or plate size at the intended distance, motion blur, highlight clipping, and noise reduction together. A modest fixed light can be more valuable than extra megapixels, provided it does not create glare or disturb neighbors.
Run a one-night pilot before buying multiples
Temporarily mount one unit close to the final position and review footage from dry weather, rain, lights switching on, people moving toward and across the lens, and the darkest expected hour. Check whether autofocus hunts, color mode changes too late, or compression destroys detail. Record the settings that worked. This pilot reveals placement failures that product specifications and indoor demonstrations cannot reproduce.