SYLVANIA3157 ZEVO LED Red Bulb - Bright LED Bulb, Ideal for Stop and Tail Lights (Contains 2 Bulbs)

I have a '23 F-250 with the Ultimate Lariat Package and Ford cheaped out on the LEDs for this truck. Incandescent bulbs for the taillights, license plate lights and 3rd brake/bed lights. Replaced all lights with LEDs except for the taillights. Had read that replacing the taillights with LEDs would cause hyper flash because of the low amperage of the bulbs and the truck would assume the bulb was out. Read about these and tried them out. Easy two bolts to remove the light housing and bulb sockets twisted out and bulbs just pulled out of sockets. Super easy. Tried both turn signals and emergency flashers and all works! Just don't make the mistake I did...buy 2 packages as each taillight takes 2 bulbs.

This problem with most aftermarket LED replacement bulbs is that their various designs do not emit light as efficiently as the old incandescent bulbs do. Despite what manufacturers will tell you, they are a poor mismatch with the various internal projection geometries of any given vehicle taillight. For bright light to emit efficiently, the reflector or Fresnel lens type taillights of any given vehicle have an important relationship with the bulb and must focus properly. An incandescent lamp emits light in all directions from the central filament point of the lamp. The aftermarket LED products typically emit light mostly from the broader sides of the barrel of the lamp assembly. Therein lies the issue. The LED light source cannot focus properly towards the other elements of the taillight assembly and out the rear of the vehicle.Having seen the poor visibility results of improper LED bulb choices on other's cars, I looked for a few hours to find a lamp that would work properly with my Chevrolet Tahoe tailights (internal rear reflector surrounding the bulb socket). Enter the SYLVANIA - 3157 ZEVO LED Red Bulb. Like an incandescent, it emits light from two super bright LED elements at a central focus point and towards the rear reflector surrounding the lamp socket (a common arrangement in many vehicles). Light is efficiently and brightly emitted out the lens (much brighter than the incandescent). It works perfectly on this type of taillight.Now the caveat. This particular lamp may NOT work well with the integrated fluted Fresnel lens elements on other cover assemblies. It's LEDs focus light only around and towards its socket base. However, IF there is a reflective surface there, than this lamp should work projecting the light onward through the Fresnel lens.Getting the right lamp that works well with your taillight assembly an important visibility and safety factor too.

Blinking Speed was “hyper flashing” until I disabled ‘bulb out warning’ in a tool known as ForScan for my Taurus (google it).The value for the money is excellent because they are bright, use less power, and activate faster.The lights are also used for my brake lights and work perfectly. Fit and installation was perfect! A simple drop in replacement for my use.I highly recommend these to anybody who knows they will work. Simply activating faster than a normal bulb is a safety issue and can prevent an accident.If you are unable to disable your “bulb out warning” or have hyper flash issues you may need the Sylvania resistor. Else look for a CANBUS safe LED.

Great tail light bulbs. They are bright and do as they should. However they can throw off the computer of older vehicles. I installed these on a 2003 GMC Yukon as brake/tail lights and the module was tricked into believing the tail lights were inoperable, which made the cruise control stop working. I threw in 50 watt (instead of these 150 watt) LED bulbs and the cruise control started working again. This is no fault to the bulb, just be knowledgeable on the wattage you put on older vehicles. The bulbs themselves are very nice.

SYLVANIA - 3157 ZEVO LED Red Bulb: This bulb is lower wattage (1.5/0.4W) than the white version (1.7/0.7W) on both segments (high and low power 3157 'filaments'/LEDs).If used as a single filament 3156 bulb you get the bright filament/LED, the low wattage 'filament' is unused.LED facts: This one uses RED LEDs so most of the light passes through the red plastic lens that normal/OEM cars use for break/stop/running. I tried the white ZEVO LED bulb version behind the same lens and IT IS DIMMER even though it is higher wattage. THIS IS CORRECT. The white LEDs emit a low percentage of light in the red spectrum so most of the white LED light is absorbed which makes for a dimmer light after passing through a red lens. Most of the red LEDs light (high percentage) passes through a red lens.An issue, there are two sides to this LED and a large center heatsink. This makes for a no-light center spot. Since the light is so bright this is a minor issue (for me). Regular bulbs have a ceter bright/hot spot so this LED design is the opposite.Also, since the LED is two sided they will emit most light either up/down or left/right. In my 1997-2000 Caravan design tail lights I get both up/down and left/right. This is not a big issue since the lenses are a good design and the light both bounces around well and is captured by the Fresnel lens facets and reemitted in a good pattern. Matter of fact the lenses emit is a nice full bright glow instead of having the usual hot spot in the center. Different but nice.Remember, if used for the turn signal light you'll have the usual fast blink issue. You'll have to install a 6/4/3 ohm resistor to stop the fast blink.

Used these in the taillights of my 2017 Polaris 450 and worked great. Easy install and fit. They are brighter than the factory lights and are easier to see for safety. Lifespan is yet to be seen.