Like a Dirichlet distribution. The two lamps split weights 0-1, and then get that percentage of some absolute quantity, like lumens. A real-world use case might be lighting an interior room, where you want a certain absolute amount of brightness, like 1000 lumens, but maybe the ratio changes so the lamp behind you gets brighter and the one in front gets dimmer so you can read.
Like a Dirichlet distribution. The two lamps split weights 0-1, and then get that percentage of some absolute quantity, like lumens. A real-world use case might be lighting an interior room, where you want a certain absolute amount of brightness, like 1000 lumens, but maybe the ratio changes so the lamp behind you gets brighter and the one in front gets dimmer so you can read.