Which type of light is known to create blue or cool tones depending on its design?

Fluorescent light is known for its ability to produce cool or blue tones primarily due to the phosphor coating inside the bulb and the type of gas used. These lights often emit a spectrum that leans towards the cooler end, making them suitable for environments where bright, crisp lighting is necessary. This quality is particularly valued in certain settings, such as salons, where accurate color perception is crucial for hairstyling and coloring tasks.

The design of fluorescent tubes allows them to be produced in varying color temperatures, ranging from warm to cool tones, with the cooler variants often favored in professional settings for their ability to enhance visibility and reduce eye strain.