Which word would describe a "shimmering" effect?

The word that best describes a "shimmering" effect is associated with a weak and tremulous light. Shimmering typically conveys the idea of light that flickers or dances, resulting in a delicate, soft illumination that can evoke images of the surface of water reflecting sunlight or a gentle light source that is not steady. This quality of being weak and tremulous captures the essence of shimmer, implying subtle variations in brightness and a sense of movement.

In contrast, a constant bright light lacks the dynamic quality of shimmer, providing a uniform and steady illumination instead. A solid and unwavering glow also represents a consistent light source, which does not align with the flickering nature of shimmering. A harsh and blinding glare, on the other hand, is characterized by an intense and overpowering brightness, far removed from the gentle and nuanced quality implied by the term "shimmering." Thus, the description of a weak and tremulous light is the most fitting choice for this effect.