I've not encountered a non-white LED that was even vaguely visible through a layer of black electrical tape, and there's always room for a second layer.
Gaffer’s tape works better for me because its material properties and packaging make it suitable for a wider range of applications.
It handles many of my off label uses for electrical tape and duct tape. It is designed for versatility.
Every time I use good tape I know it was worth it. Good tapes just tape better.
If I need lots of tape, I am using the wrong tape and two or three rolls of the wrong tape is just more of wrong.