These are R/H/Drive, see
S4699B for L/H/D.
Even at normal highway speeds it is common to "outdrive" conventional headlamps. These halogen headlamps have very bright 55/60 watt bulbs. Their special lens gives good long range vision while also projecting a beam to the side for improved vision when turning. As an added bonus, they are equipped with the european-style internal parking lamp which can be easily wired into any car.
RHD HEADLAMPS DIP TO THE LEFT. Replacement side lamp bulb holders are
S4276 and the bulb is
GLB501.