I personally use 60/-5 for 60ft darkvision in 5e. If you use API scripts, here's a macro (originally by Ziechael) that handles a bunch of different vision and lighting options for 5e using TokenMod: !token-mod --set ?{Vision|Torch, light_radius#40 light_dimradius#20 light_hassight#yes light_angle#360 light_otherplayers#yes|Lamp, light_radius#30 light_dimradius#15 light_hassight#yes light_angle#360 light_otherplayers#yes|Bullseye Lantern, light_radius#120 light_dimradius#60 light_angle#60 light_hassight#yes light_otherplayers#yes|Hooded Lantern, light_radius#60 light_dimradius#30 light_hassight#yes light_angle#360 light_otherplayers#yes|Candle, light_radius#5 light_dimradius#=0 light_hassight#yes light_angle#360 light_otherplayers#yes|No light source, light_radius#5 light_dimradius#=-5 light_hassight#yes light_angle#360 light_otherplayers#no|Blinded, light_hassight#no light_angle#360 light_otherplayers#no|Darkvision, light_radius#60 light_dimradius#=-5 light_hassight#yes light_angle#360 light_otherplayers#no|Darkvision (90'), light_radius#90 light_dimradius#=-5 light_hassight#yes light_angle#360 light_otherplayers#no|Warlock Devil's Sight, light_radius#120 light_dimradius#=120 light_hassight#yes light_angle#360 light_otherplayers#no|No light source(Dusk), light_radius#120 light_dimradius#=-5 light_hassight#yes light_angle#360 light_otherplayers#no }