Emphasis is the principle by which an artist draws attention to particular content. A focal point is a specific place of visual emphasis in a work of art or design. Most works of art have at least one area of emphasis and multiple focal points.
An artist can emphasize focal points through the use of line, implied line, value, color or as it so happens in this case, more than 14,000 LED lights. " Like the bull’s-eye on a target, focal points concentrate our attention. Even though our field of vision is fairly wide, at any given moment we can only focus our vision on a small area. The physiology of vision underlies the principle of focal point. "
Image Source: Designboom