What kind of lamp are we talking about here? Understanding the details of this ancient light reveals more about its intended visibility.
The 'lamp' Jesus refers to was likely a common, oil-burning lamp, and the 'basket' was a standard grain measure used in every home. These weren't fancy or powerful spotlights, but essential household items.
Visibility by Design
The lamp itself wasn't hidden, but placed on a 'stand' (or 'candlestick' in some translations). This stand would elevate the lamp, making its light effective for the entire room. Even a single, modest lamp on a stand could illuminate a whole house, dispelling darkness. The point is, the natural function of this common object was to be seen and to provide illumination.