See that light bulb, does something to you
Makes it a little harder to tell a lie don’t it?
Make it difficult to run and hide don’t it?

from Frank Ocean – Scared of Beautiful Lyrics on Rap Genius

Meaning

When the “light” is on he can see who he really is. All his flaws and imperfections. There’s no denying it or hiding from it.
Also could mean a light bulb lite up over his head like he just figured something out.

The police use light during interrogation shining it in the suspects eyes sweatin' them. Its annoying and confusing and can lead to the suspect breaking and spilling the truth. In this case Frank is sweating himself.

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