3157 ZEVO LED Red Bulb - Bright LED Bulb, Ideal for Stop and Tail Lights (Contains 2 Bulbs)

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.

These were put in the tail lights of a 2017 F350. They work perfect and boy are they bright. I’m going to replace the reverse lights next.

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.

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.

Excellent product

'08 Liberty brake lights, red bulb under red lens is perfect. Brighter than bright conventional bulbs it replaces. Buyer keep in mind these things. First these are made for housings with reflectors inside to bounce the light out, like car taillights. If your housing has no reflector (trailer, commericial, old jeeps) half or more of the LED light will get absorbed by the housing, buy a proper LED replacement fixture or stick with standard bulbs. Second LEDs have a narrow spectrum of light compared to conventional bulbs so don't buy white for a red or yellow lens or it will be dimmer than it could be. Instead red lens = red bulb, yellow lens = yellow bulb. Third don't judge on the number of LEDs, these are bright high quality LEDs with an excellent heat sink to keep them working well for a long life. And lastly if replacing your turn signals plan on buying an LED flasher to prevent hyper flash. Hyper flash is a feature in old flashers to let you know a bulb was blown. These draw so much less power they are going to act like a failed bulb to old technology flashers. If you cannot handle replacing the flasher then you certainly shouldn't be splicing in load resistors, just buy a conventional bulb for your turn signals.

Returned these. I imagine these are high quality and would last a long time because SYLVANIA is a reputable brand but they are by far not the brightest. I ended up going with syneticusa brand for my brake light bulbs and blinkers. They come with a resistor for blinkers and are very bright and vibrant. SYLVANIA requires a load resistor that you have to add yourself. Would not recommend these over stock halogen bulbs, don’t waste your money.