6 in Apollo Pro Halogen lights deliver 400 lx at 10m of light output with a beam distance of 400 meters. The Apollo Pro's optical glass lens computer designed polished optical reflectors and powerful 100W Halogen bulbs combine to produce super bright light output. Not only is there more range and power but also improved clarity. Different beam patterns offer advantages depending on your specific lighting needs. Fog Beam- Provides a low extremely wide angle light pattern that increases visibility below your headlights into the distance. Fog beam adds additional light to directly in front of your vehicle with side illumination for road edges. Fog beam performs well in Fog Snow Rain or low visibility conditions. The Apollo Pros were created for the most demanding off road terrains.