Consumer Reports last month actually ran one for 25,000 hours straight and it still maintained its brightness.
The champagne brings out the brightness and tang of the grapefruit.
It was poignant because with her brightness and her zest for life, she is also dealing with something very dark.
(Or "tone", "luminance", "value", "luminosity", "lightness") The coordinate in the HSB colour model that determines the total amount of light in the colour. Zero brightness is black and 100% is white, intermediate values are "light" or "dark" colours.
The other coordinates are hue and saturation.