#67 – DR LIGHT
In Arrow episode 2×19, Caitlin Snow ( Daniele Panabaker) and Cisco Ramon (Carlos Valdes) from STAR Labs made a reference to an ex-employee Dr Light ( see gifs above )
In the comics, Dr. Light is a recurring enemy of the Justice League and the Teen Titans, manipulating light energy for various nefarious purposes.
#100ArrowDCComicsEasterEggs || 67 days until the premiere of Season 3
Gif source: theflashgifs