Holley's RetroBright LED Headlights offer significant improvements over traditional sealed beam headlights. They provide enhanced visibility, a longer lifespan (up to 6 times longer), and reduced heat and power consumption due to their LED technology. Designed for classic cars, these headlights feature a low-profile housing that fits most shallow headlight buckets without the need for cutting or drilling. Developed in collaboration with lighting design leader Morimoto, RetroBright headlights maintain peak intensity with a built-in PWM LED driver. For instance, the 7" Round LED offers 32,000 Candela for low beam and 53,000 Candela for high beam, delivering nearly three times the light output of standard headlights.RetroBright headlights come in various sizes to fit popular round and rectangular housings, including 5.75", 7", 4"x6", and 5"x7". They are available in two color temperatures: 3000 Kelvin for a classic look and 5700 Kelvin for a brighter, modern appearance. Additionally, yellow lens options are available for a European style. Each headlight is sold individually, so order two for dual headlight setups or four for quad headlights. Older Toyota models may need an H840 switched ground harness. For those with non-standard connectors, basic wiring modifications may be required, with instructions and necessary connectors provided. This model may not be plug-and-play for all applications, so review compatibility before installation.