If you want to use the same glow as me put this in your "autoexec.cfg" in
"C:/Program Files(x86)/Steam/steamapps/common/Left for Dead 2/left4dead2/cfg"
if one is not there make one.

cl_glow_survivor_health_bleed_pulse 1
cl_glow_survivor_health_bleed_pulse_amount 1
cl_glow_survivor_health_bleed_pulse_speed 30
cl_glow_survivor_health_include_buffer 1
cl_glow_ability_r 1
cl_glow_ability_g 0
cl_glow_ability_b 0
cl_glow_infected_r 0
cl_glow_infected_g 1
cl_glow_infected_b 1
cl_glow_ghost_infected_r 1
cl_glow_ghost_infected_g 1
cl_glow_ghost_infected_b 1
cl_glow_infected_vomit_r 1
cl_glow_infected_vomit_g 0
cl_glow_infected_vomit_b 1
cl_glow_item_r 0
cl_glow_item_g 1
cl_glow_item_b 0
cl_glow_item_far_r 0
cl_glow_item_far_g 1
cl_glow_item_far_b 0
cl_glow_thirdstrike_item_r 0
cl_glow_thirdstrike_item_g 1
cl_glow_thirdstrike_item_b 0
cl_glow_survivor_r 0
cl_glow_survivor_g 1
cl_glow_survivor_b 1
cl_glow_survivor_health_crit_r 1
cl_glow_survivor_health_crit_g 0.2
cl_glow_survivor_health_crit_b 0.2
cl_glow_survivor_health_high_r 0
cl_glow_survivor_health_high_g 1
cl_glow_survivor_health_high_b 0
cl_glow_survivor_health_med_r 1
cl_glow_survivor_health_med_g 1
cl_glow_survivor_health_med_b 0
cl_glow_survivor_health_low_r 1
cl_glow_survivor_health_low_g 0
cl_glow_survivor_health_low_b 0
cl_glow_survivor_hurt_r 1
cl_glow_survivor_hurt_g 1
cl_glow_survivor_hurt_b 0
cl_glow_survivor_vomit_r 1
cl_glow_survivor_vomit_g 0
cl_glow_survivor_vomit_b 1
cl_witch_glow_idle_r 1
cl_witch_glow_idle_g 1
cl_witch_glow_idle_b 1
cl_witch_glow_angry_r 1
cl_witch_glow_angry_g 0
cl_witch_glow_angry_b 0
cl_witch_glow_range 1500

all commands from http://hstop.screensider.com/faq

have fun