The Oceanic Convection Diagnosis and Nowcasting System

A writing instrument with a light assembly includes a barrel, a nib assembly, a lamp unit and a thrusting unit. The nib assembly includes a nib casing connected to an open lower end of the barrel and an ink tube with a writing tip disposed inside the nib casing. The ink tube is movable between a first position, wherein the writing tip is disposed in the nib casing, and a second position, wherein the writing tip extends out of the nib casing. The lamp unit is disposed operably inside the barrel. The thrusting assembly includes a cap member connected to an open top end of the barrel and a push-button provided on the cap member. The push-button is operable to move the ink tube between the first and second positions and to turn on the lamp unit when the ink tube is in the second position and turn off the lamp unit when the ink tube is in the first position.