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3156/3157 CK LED Bulb - Dual Function 27 SMD LED Tower - Wedge Base

Overview
These CK-wired bulbs can fit standard or SRCK- and SACK-compatible vehicle tail lights, reverse lights, brake lights, turn signals, and side marker lights. They contain both grounds on the same side of the wedge, but because these bulbs are not polarity sensitive, they can be used in any non-SRCK/SACK 3156 or 3157 socket as well. This dual-contact, dual-function 3156/3157 bulb emits a 360° viewing angle for better, allover light emission with reduced hot spots. Tower-style design with a 16-mm wedge base for easy plug-and-play installation. The energy-efficient bulb operates within a 9-14.8 VDC range and is designed to last 25 times longer on your car, truck, SUV, or van than incandescent bulbs. Use a ground tester or contact your dealer to see if your vehicle has CK light sockets. Available in amber, red, natural white, and cool white color. Not sold in pairs. Amber lights feature high-intensity LEDs that are ideal for high brightness LED applications. Price per bulb.

- Truck And Car Cabin Lights
- RV Interiors
- Turn Lights
- Side Marker Lights
- Tail Lights
- Reverse Lights
- Brake Lights
- Dome Lights
- Turn Lights
- Side Marker Lights
- Tail Lights
- Reverse Lights
- RV Interior Lighting
Specifications
Click any blue question mark for specification details and explanation.
Part NO | CCT / Wavelength | Brightness | Current Draw @ Operating Voltage | Price Ea. | Product Weight | Constant Current | |
---|---|---|---|---|---|---|---|
- | 3157-A27-T-CK | 596 nm | 67/200 lm | 0.08/0.25A | $14.95 | - | - |
- | 3157-R27-T-CK | 633 nm | 16/46 lm | 0.08/0.22A | $14.95 | - | - |
- | 3157-CW27-T-CK | 6300 K | 90/270 lm | 0.08/0.25A | $14.95 | - | - |
- | 3157-NW27-T-CK | 4000 K | 90/270 lm | 0.08/0.25A | $14.95 | - | - |
- | 3157-A27-T-CK-2PK | 596 nm | 67/200 lm | 0.08/0.25A | $29.90 | - | - |
- | 3157-R27-T-CK-2PK | 633 nm | 16/46 lm | 0.08/0.22A | $29.90 | - | - |
- | 3157-CW27-T-CK-2PK | 6300 K | 90/270 lm | 0.08/0.25A | $29.90 | - | - |
- | 3157-NW27-T-CK-2Pk | 4000 K | 90/270 lm | 0.08/0.25A | $29.90 | - | - |
Lumen meters are a great way to measure white light output but can be deceptive for colored bulb intensity. Lumens measure light wavelengths in all colors of the visible spectrum. Because multiple wavelengths create white light and colored bulbs are a single-wavelength source, colored bulbs will have lower lumen readings. However, they will appear equally as bright as a white bulb. | ![]() |
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- When looking for a replacement bulb, the way the socket is wired determines the part number of the replacement bulb. Sockets that are used for a single intensity call for 3156 or 7440 bulbs (single filament), while sockets that have a dual intensity call for 3157 or 7443 bulbs (dual filament). Dual filament bulbs will function properly in a single intensity socket. So a 3157 bulb will work in a 3156 socket and a 7443 will work in a 7440 socket. However, single filament bulbs will not function in a dual intensity socket. CK indicates where the socket's positive and negative terminals are located. CK LED bulbs are very versatile and can be used in any application a CK or non-CK bulb is used.
Accessories

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2002 Silverado DRL Replacement Bulb
This LED bulb should be in all Chevy Silverado pickups! The cheap plastic ($32) sockets are terrible and can't withstand the heat generated by the original bulbs. I wished I had put these in when I first bought my pickup.
They are brighter than the original and will last longer! Five Star quality product. Exact replacement bulb.
Exactly As Described
I am thrilled with these LED lights. They are so much brighter and whiter than stock. Install was easy, they were installed in less than 5 minutes. This is my 2nd purchase from SBL and I can't wait to order more from SBL and I am now hooked on LED lights.