Candela vs Lumens
MrGunsnGear talks about difference between the two
For those who want to geek out a little more here are two blogs that might help a bit
A bit more in layman's terms
https://blog.1000bulbs.com/home/whats-the-difference-between-candela-lux-and-lumens
and a bit more geeky
https://www.compuphase.com/electronics/candela_lumen.htm
For a nice graphical representation, here is one from an automotive blog
http://blog.streetsideauto.com/auto-parts/are-automotive-leds-worth-the-cost/
From: MrGunsnGear, Compuphase, StreetSide Auto, 1000bulbs