Light tube 

slang for tunnel

Hold your breath until we reach the end of the light tube.

There's a brightness at the end of the light tube.

Light tube by cdds2011 November 25, 2011

tube light 

Someone who doesn't get a statement, be it a joke or anything else.

He's such a tube light...doesn't get anything!

tube light by Juhi August 23, 2006

tube light 

some one whos slow when it comes to jokes
it takes him a while to get a joke.

tube lights flash 3-4 times before they go on.

a slow person blinks 3 - 4 times before getting a funny joke and then laughs

maaan ur such a fuckin tube light
i hate tellin jokes to tube lights
your a tube light, ass hole
you killed the joke tube light

tube light by Sincere February 28, 2005

Tube-Light Analysis 

This is a term used to refer to someone that's observed or analysed something that has already been implied or is obvious.

Commentator of a game: Mumbai Indians lost the match due to their poor batting display.
David: Mumbai could've batted better.
David's friend: Why does this guy give his tube-light analysis all the time

Tube-Light Analysis by Imtheberrybadguy September 27, 2021

Lighttub 

A cute and idiotic person that makes everyone laugh because they’re so stupid

Wow look he’s lighttub!

Lighttub by 4igital March 31, 2021