LED how should I configure red and blue lights for plant growth lights?

Objective: indoor plant seedlings not long steep tools: LED red and blue plant growth lamp problems: how to configure the proportion of red and blue?

Conventional red blue ratio is 8:1, red light is best to use 650-660NM blue light, better choose 455NM is better.

Conventional red blue ratio is 8:1, red light is best to use 650-660NM blue light, better choose 455NM is better.

Conventional red blue ratio is 8:1, red light is best to use 650-660NM blue light, better choose 455NM is better.