I spoke to ARC about their 7440/7443 LED Bulbs # ARC95FR, and it will get brighter when the brake signal is run to it. These really are used as brake lights in vehicles and or trailers, so they do have this function built in. Static, or running lights, will run at 300 lumen, but when the brake signal hits it, it will light up to 600 lumen. view full answer...
The curved shank of the Swagman Traveler XCS you referenced, part # S64664 slides into a housing and is held in place by set bolts. The Swagman replacement shank, part # P306 would work for you. view full answer...