brightness
noun
[ ˈbrʌɪtnəs ]
• the quality or state of giving out or reflecting light.
• "we can change the brightness of the bulb"
• the quality of being intelligent and quick-witted.
• "he reminded me of my first son with his brightness and inquisitiveness"
• the quality of being cheerful or lively.
• "there's so much light and brightness in their faces"
• the quality in sound of being clear, vibrant, and typically high-pitched.
• "tone alters the brightness of the sound"
