Schermulys!

A Schermuly (aka “L12A2 Parachute Illuminating Flare”, or similar) would be an awesome addition to the game.

There’s some risk of giving away your position when the rocket initially whooshes up, but then there’s a flickery plop as the flare bursts to life, and illuminates the area for 30 seconds as it floats down on its little parachute. Meanwhile, those bastards sneaking up on my base with a their sweaty hands full of C4 can then get on first name terms with the business end of my M4.