1) Abated 1) Became faint 2) Darkened 3) Dipped 4) Like some car headlights 5) Low-beam 6) Lowered lights 7) Lowered the light 8) Lowered the lights 9) Lowered the wattage of 10) Made dim or less bright 11) Switched to low beam 12) Switched to the low beam 
• (imp. & p. p.) of Dim
Unavailable or disabled. A dimmed button or command is displayed in light grey instead of black, and it cannot be chosen.
[adj] - made dim or less bright
adjective made dim or less bright; `the dimmed houselights brought a hush of anticipation`; `dimmed headlights`; `we like dimmed lights when we have dinner`