Heng lamp based off instructables and the original kickstarter heng lamp. Uses a pair of magnets to pull together (floating in picture) which pulls up the arm of a micro-switch to turn the LEDs on.

Print 1x of each of the heng lamp halves and then 4x of the magnet holder halves.

Video here: https://www.youtube.com/watch?v=r6kJguZKtis

Ibles link: http://www.instructables.com/id/3D-Printed-Heng-Lamp/

Designed in inventor very quickly and sloppily. I've provided the ipt file in case you want to modify it.