Lumens units on lights

So since I’ve upgraded to the 4.19 preview. I’ve found that lights have FINALLY had some units added. I tried to convert some lights over to Lumens to create a more realistic feel. When I did this and built the lighting again, I found they were way out. I tried to replicate a 10W LED that gives off 600lm (According to a chart found on Google). Instead, I got some blinding lights and I wasn’t sure if I’d done something wrong when changing the lights? I simply changed the units to Lumens, swapped my original value to 600 and then built my lighting and got blinded. Did I do something wrong or do I need to use another value?

Thanks in advance.