Blackout curtains have different levels. From your comment it seems to me you probably tried 100% blackout curtains. Those are quite overkill.

You should try 80% blackout curtains, they block almost all of night lights and have a warm yellowish haze during the day.

Searching for trash

A little context, he is the previous CEO of NITI Aayog, the "company" in question.

Niti aayog is a government owned think tank/ company whose purpose it is to do bring and do feasibility studies of possible government policies. The person is a civil servant and this was his previous job.

The company isn't a multi-billion dollar company, it's basically the government, that too under the bureaucratic wing of the government.

Nice try, you almost had me there.