Sleep Light on for a long period of time during some startups

Sometimes when I boot up, my MacBook Pro's sleep light stays on for an extended period of time and the screen, boot noise, and optical drive check and so on don't happen until it turns off. Why does it stay on longer sometimes than others?

check under the system preferences > energy saver > on the top of the page there is a timeline to set the time your mac will stay in standby before going to sleep, and that could be set to "never" which would prevent your computer to go to sleep mode

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