Over time changing the plurality of types of other light-emitting unit of the light emission characteristics (for example, EL elements) to the light emitting consisting includes a method (for example, EL device), a good even after a certain amount of operating time of the lapse of the light-emitting state a light emitting body that can be obtained, and also provides a method of designing a light-emitting luminance and luminance design program and the electro-optical device, electronic apparatus.; Change over time of the light emission characteristic is the luminous body is configured including a light emitting unit of the other plural kinds. The amount of deviation between the light emission life of the light emitting unit has the initial luminance is set in the light emitting unit so there is no more than 20%.
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