The number of lumens you need depends on the specific task and the size of the area you are illuminating. For instance, for a small desk area, 300-500 lumens should suffice. For a living room, you may need anywhere between 1000-3000 lumens. Outdoor lighting may require 4000 lumens or more. It’s also important to consider the type of light (warm vs cool), the direction of the light, and personal preference.