Street lighting provides illumination along roads for nighttime safety and comfort. Three main types: single side, staggered, and central lighting systems. Proper lighting improves visibility and reduces driving stress. Necessary at intersections, bridges, and traffic-banned areas
Produces light through electric arc using mercury vapor and metal halides. Contains quartz arc tube with electrodes and outer glass bulb. Operates at pressures between 4 and 20 atmospheres. Requires electrical ballast to limit arc current
Engine converts heat from burning gas to power wheels through internal combustion. Power train sends engine power to wheels through transmission and differential. Battery stores chemical energy for car's electrical systems. Alternator converts mechanical energy to electricity for vehicle operation
Emergency vehicle lighting is used to visually announce vehicle presence. Blue lights originated in Germany during WWII for aerial defense. Early emergency lights were red, later switched to blue
Automotive lighting has evolved from filament bulbs to LED and laser technologies. LED bulbs offer superior efficiency and temperature resistance. LED technology provides cool white light and longer lifespan