Noun: main beam headlamp
- A car headlamp that provides a bright, centre-weighted distribution of light with no particular control of light directed towards other road users' eyes; as such, it is only suitable for use when alone on the road, as the glare it produces will dazzle other drivers
"On the empty country road, she switched to the main beam headlamps for better visibility";
- driving beam headlamp, full beam headlamp, high beam headlamp