The bulbs of this model are bigger in size than the average. 12v powered lights are a great fit for the city-based vehicles as the guarantee up to 5,000 hours. The 3157 extra contacts don’t connect to anything in the 3156 socket and the bulb will light high beam only in the 3156 socket. SRCK: If you use a conventionally wired 3157 led bulb in a socket sockets are wired using a multi-meter. conventionally wired led bulbs, there are two solutions: 1. As with the 3157, the 7443 features dual-colored LED lights with 360 degree output for that coveted “best in class brightness.”. This design gives added protection against overheating and exposure to other potentially-damaging elements, while models that contain a resistor on both light filaments are more prone to melting or falling apart within the housing. If you remove the bulb, rotate it 180 degrees and New! The main difference between the 3157 and the 7443 model comes down to size. The 3157 has its major filament rated at 12.8v and a much shorter lifespan. In addition to delivering an impressive amount of light, LED bulbs also come in handy when navigating between light and dark driving conditions, as well as in inclement weather. Underground Lighting offers you the best and most extensive collection of H11 headlights . However, for day time running bulb, 3157 … 3157-SRCK (Red) or SACK (Amber) These LED automotive bulbs are long lasting and feature advanced chip material. Use care when bending the leads and only bend one time to avoid breaking them off. One of these two contacts is the common negative (-) ground. lights). The 7443 extra contacts don’t connect to anything in the 7440 socket and the bulb will light high beam only. . The 3157 has four separate wire contacts protruding from the bottom. The main bulb number is 3157. LED bulbs are best known for their energy-saving efficiency. This model is easily installed and features 1200 lumens per bulb. Let’s take a look at two types of Switchback LED bulbs in particular—the 3157 and 7443 models. The 7440 is a single contact (s.c.) bulb. So if you are thinking of switching to LED lights, these two models are ideal candidates for the job. The main difference between the 3157 and the 7443 model is the size—the 7443 model’s length is: 2.32in / 59mm. Bayonet Tail-Brake Turn Signal Back-Up, Tail Brake Turn Back-Up Reverse Light 1156 1157 1142 2357 7507 7225 Bayonet Bulbs, LED Bulbs 3157 3156 3457 4157 3057 Tail Brake Turn Back-Up DRL Reverse Light, Xenon HID Bulbs 3157 3156 3457 4157 3057 Tail Brake Turn Back-Up DRL Reverse Light, Chrome Xenon Bulbs 3157 3156 3457 4157 3057 Tail Brake Turn Back-Up DRL Reverse Light, Switchback Two Color LED Bulbs 3157 3156 3457 4157 3057 Tail Brake Turn Back-Up DRL Reverse Light, Canbus Led Bulbs 3157 3156 3457 4157 3057 Tail Brake Turn Back-Up DRL Reverse Light, See All Bulbs 3157 3156 3457 4157 3057 Tail Brake Turn Back-Up DRL Reverse Light, Tail Brake Turn Back-Up Reverse Light 7444 7443 7440 Wedge Bulbs, License Plate Side Marker Coutesy Map Interior 194 168 161 2825 W5W Miniature Wedge Bulbs, Instrument Panel 37 74 2721 T5 Sub Miniature Wedge Bulbs, Instrument Panel 24 T6.5 Miniature Wedge Bulbs, Instrument Panel Ba7s Midget Flange Bulbs, Dome Trunk License Plate Map Courtesy Vanity 3022 212 578 6418 6411 Festoon Bulbs, Ba9s E10 Screw Ba7s Bax9s B6 G18 B19 Small-Head Ba15s Bay15d Bayonet Bulbs, Upper 3rd Brake Map Trunk 579 906 921 T15 Medium Wedge Bulbs, 6 Volt - Antique - Vintage - 24 Volt Bulbs, Boat & Marine 1142 1076 1176 Bayonet Bulbs, Dura Chrome Titanium Platinum Silver Vision Stealth Bulbs, Canbus Error Free BMW Mercedes Audi VW Volvo Dodge 5002S PY24W Bulbs, Daytime Running Light (DRL) Kits & Foglight Systems, LED Screw Mount & Motorcycle Indicator-Accent-Running Lights, LED Light Tubes, Neon Light Tubes & Underbody Lights, LED Windshield Washer & Mirror Turn Signal Indicators, Angel Eye Halo Rings for Headlights, Tail Lights and Lenses, LED Strips, Led Strings, Led Bars & Control Modules, Overhead & Under Cabinet Lighting - Truck, Boat & RV, LED Light Fixtures for the Home, Boat & RV, LED Bike, Go Ped, Motorcycle, ATV, Boat and RV Light Fixtures, LED Screw Mount Indicator & Accent Lights, Semi, Truck, 4X4 & Truck Trailer Leds & Lights, Household Commercial & Industrial Lighting, Pop Up Recptacle Floor Mounted Electrical Boxes, Windshield Wipers, Tools & Automotive Accessories, LED Flashers, LED Protectors, Load Equalizers Turn Signal Fix, Electrical Contacts, Sockets, Connectors & Fuses, Led Controllers, Flashing Modules, Braker Modules & Dimmers, Programmable Remote Controllers & Switches for Garage Openers, Discrete Raw Leds, Resistors & Components, Power Inverters - Power Supplies - Power Adapters, Switchback Bulbs Two-Color Turn Signal-Running Light Bulbs, Motorcycle & RV Running Lights, Turn Signals and Indicator Lights, Vinyl Protective Film for Tinting Windows, Headlights, Tail Lights & Lenses, Black Box Dash Mount Digital Video Recorders. The leads should only be bent one time. The dual color options include white and amber, and a 360 degree output means longer-lasting, brighter shine that outlasts other well-known brands. 3057= 32/2 candlepower 3157 = 32/3 CP 3357 = 40/3 CP 3457 = 40/3 CP Lumens are lower for the amber versions. 3157 bulb Specification. Insurance is the responsibility of the purchaser! The “Switchback” portion of the name is due to the bulbs’ dual filaments, allowing the ability to switch between two light colors/shades for different intensities. The 7440 has two separate wire contacts protruding from the bottom. If the bulb is an amber coated bulb then it may be listed as 3157A. If you examine the bulb closely, you can see that two of the wire contacts connect to the same point inside the bulb. The 3157 extra contacts don’t connect to anything in the 3156 socket and the bulb will light high beam only in the 3156 socket. One of these two contacts is the common negative (-) ground. 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