



CSS box-shadow and text-shadow with large spread values and bright colours create the core glow. Multiple layered shadows at different opacities and sizes build convincing light falloff. SVG filters and canvas-based effects handle more complex luminous interactions.
Glow works particularly well for tech products, gaming sites, music platforms, and futuristic brand identities. The luminous quality suggests energy, innovation, and digital sophistication, but should be used with restraint to avoid looking overdone.