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Discussion Starter · #1 · (Edited)


Chevrolet Malibu Reverse Light LED

At Diode Dynamics, we carry a full line of LED bulbs, including three different levels of brightness for your reverse light or backup light bulb (921 size). We carry the brightest, highest-quality bulbs on the market, which we have designed in St. Louis, Missouri. Your order will ship same day, and we're here if you need us for support and service. Every bulb carries with it a three-year limited warranty.

Your purchase includes two 921-sized LED bulb, for perfect fitment in all 2005-2015 Chevrolet Malibu Models.


Bulb Design


HP36: Full 360 degree illumination with 36 High-Power Samsung LEDs. Aluminum base for optimum heatsinking, and non-polar design for easy installation.

XP50: Each of the four sides of this bulb contains two 5W-rated chips, and the top is fitted with two more under a projector lens. Housed in an aluminum casing with textured finish for maximum heatsinking properties.

Fitment. All three bulbs use a quality inject-molded 921 terminal, with a sturdy base connector and proper pin alignment, designed for exact replacement of your factory 921 bulb. You will not need resistors for backup lights. Just replace the factory bulb.

Included in your order is TWO BULBS.


COLOR

These LEDs illuminate in a crisp, cool, bright, white hue for maximum light output.

BRIGHTNESS

Diode Dynamics offers several brightness options so you can choose what fits you best. These options are listed by the design and the lumen output of each bulb:

HP36: Slightly higher brightness than OEM bulbs. (210 lumens)
XP50: Much brighter than OEM bulbs. These are bright! (410 lumens)

Lumens. BUYER BEWARE! Most sellers just provide "calculated" lumen numbers, based on the maximum potential brightness of the LED chips on the bulb. For example, if a bulb has five 10-lumen chips, they will rate it at 50 lumens. However, this is not accurate, as the design of an LED bulb does not get rid of heat fast enough to run the LEDs at maximum.

These "calculated" lumen ratings are much, much higher than the true, measured light output, so it will look like competitors' bulbs are brighter than ours. This is because Diode Dynamics does not provide inflated "calculated" numbers; we believe it is misleading. We test the actual brightness of the bulbs in our lab, to provide real lumen output measurements. Our measurements are accurate, but they are usually much lower than the misleading "calculated" figures.


QUALITY

LED Components. Diode Dynamics uses only the highest quality LED chips in the production of its bulbs. This means only brand-name suppliers such as Epistar, Cree, Osram, and Samsung.

While Diode Dynamics bulbs may look the same as others on the market, most copycat bulbs use economy-grade LED chips in order to reduce costs. This greatly reduces the reliability and overall brightness of the bulb when you compare it to Diode Dynamics.

Construction. Although LED technology allows for extremely long bulb life, the market is flooded with cheap LED bulbs that fail prematurely due to inferior construction. The worst enemy of LEDs is excessive heat, and when bulbs are not designed properly, they do not disperse heat as well, leading to premature failure.

Off-brand, cheap bulbs exhibit poor solder uniformity, high levels of flux in the solder, uneven chip placement, low-gauge terminal wires, poor assembly, and bulbs held together with inferior adhesives. At best, solder joints will crack and fail on low-quality LEDs after a few weeks of use. In the worst case, these bulbs can damage housings as the extra flux and adhesive evaporates and creates a residue on the lens of the housing.

Diode Dynamics bulbs are produced with modern, computerized equipment, and only the best materials, to ensure complete uniformity, high quality, and long bulb life.

All Diode Dynamics products come with a 30-day satisfaction guarantee and a 3-year limited replacement warranty.



Questions? Feel free to ask here, PM, email [email protected] or call us: (314) 205-3033

*PM us for the free-shipping code* (U.S. forum members only)

Thank you!
Nick C.
Diode Dynamics

 

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I tried a set of led 921 for the reverse lights.. Half the diodes remained on even if the car wasn't in reverse. Then when I put it on reverse all the diodes illuminated and they were bright. How do I know I will not have the same issue with this set?
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

The incandescent 921 back up bulb in my 06 Malibu consumes 18 watts and produces 264 lumens. The suggested
LED #HP36 [210 lumens] would in fact produce less light. Best to look into these things before you buy.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Do you guys make an LED with built in resistor?
Not sure if they do, but resistors would only be needed if you plan on using LED's for signals or brake lights:nerd:

The incandescent 921 back up bulb in my 06 Malibu consumes 18 watts and produces 264 lumens. The suggested
LED #HP36 [210 lumens] would in fact produce less light. Best to look into these things before you buy.
I agree, the person should look into what they want, if they want the great LED color that is easier on the eyes rather than bulbs, but less brightness if bulbs already bothers them, or extreme brightness :D both of which Diode provides, with a good amount of colors to pick from on some types I noticed.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

I tried a set of led 921 for the reverse lights.. Half the diodes remained on even if the car wasn't in reverse. Then when I put it on reverse all the diodes illuminated and they were bright. How do I know I will not have the same issue with this set?
i have this problem with another set of lights. They stay on partially always, even when the car is off and/or not in reverse. I have a 2016 hybrid. Is this something we can correct? This symptom indicates that there's always some voltage applied to the bulbs, and that would be the case even with incandescent bulbs, meaning a power drain at all times.

Update: it seems to go off after about 10 minutes once the car is left alone.

This is also on the same connector as the parking lamp/dim red light in the housing next to it that is illuminated when the parking/headlights are on.

Another issue is that these lights are dimly lit this way constantly while driving, and at night I'm sure they're noticeable. There's a law somewhere that no white light may be visible from the back unless the car is in reverse.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Load-balancing resistors will solve the problem of LEDs being dimly illuminated when they replace an incandescent bulb. All you need is 1 resistor for the entire circuit, not 1 for each bulb as in the case of turn signals.

I swapped out the dome light bulbs in my Gen7 and now the largest of the bulbs (rear dome) is dimly lit at all times, no matter if the key is on or removed from the car. By putting 2 6-Ohm resistors in series (total=12 Ohms) they are now completely dark when they're off because the miniscule constant power in the circuit now runs thru them and keeps the LEDs dark. (Does that make the DEDs - DARK-emitting diodes? ;))

The reason I put both of them in series is to keep them from getting as hot as using just one. It works out better for the dome lights since they don't need the larger current passed by the 6-Ohm resistor. 12 Ohms passes 1/2 of the current of a single resistor and therefore has 1/2 the heat.
 

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Discussion Starter · #11 ·
Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Load-balancing resistors will solve the problem of LEDs being dimly illuminated when they replace an incandescent bulb. All you need is 1 resistor for the entire circuit, not 1 for each bulb as in the case of turn signals.

I swapped out the dome light bulbs in my Gen7 and now the largest of the bulbs (rear dome) is dimly lit at all times, no matter if the key is on or removed from the car. By putting 2 6-Ohm resistors in series (total=12 Ohms) they are now completely dark when they're off because the miniscule constant power in the circuit now runs thru them and keeps the LEDs dark. (Does that make the DEDs - DARK-emitting diodes? ;))

The reason I put both of them in series is to keep them from getting as hot as using just one. It works out better for the dome lights since they don't need the larger current passed by the 6-Ohm resistor. 12 Ohms passes 1/2 of the current of a single resistor and therefore has 1/2 the heat.
Thank you for responding with the correct advice and information!

Nick C.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Thank you for responding with the correct advice and information!

Nick C.
Spreading correct information is never a bad thing. Glad to share, and thanks for the kind words and the like! :)
 

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Discussion Starter · #13 ·
Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Spreading correct information is never a bad thing. Glad to share, and thanks for the kind words and the like! :)
We will have to find a new Malibu here in St. Louis to bring in for an installation video with the resistor

Nick C.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Load-balancing resistors will solve the problem of LEDs being dimly illuminated when they replace an incandescent bulb. All you need is 1 resistor for the entire circuit, not 1 for each bulb as in the case of turn signals.

I swapped out the dome light bulbs in my Gen7 and now the largest of the bulbs (rear dome) is dimly lit at all times, no matter if the key is on or removed from the car. By putting 2 6-Ohm resistors in series (total=12 Ohms) they are now completely dark when they're off because the miniscule constant power in the circuit now runs thru them and keeps the LEDs dark. (Does that make the DEDs - DARK-emitting diodes? ;))

The reason I put both of them in series is to keep them from getting as hot as using just one. It works out better for the dome lights since they don't need the larger current passed by the 6-Ohm resistor. 12 Ohms passes 1/2 of the current of a single resistor and therefore has 1/2 the heat.
What is the power handling requirement of this additional 12 ohms of resistance? Remember that all of the power for the lighting of the LED in bright mode must pass through this and adding 12 ohms of resistance here will diminish the voltage across and therefore the power usable by the LEDs themselves, likely resulting in a noticeable diminution of light output/brightness under normal operating conditions (that is, with the lights on).
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

In the daytime I did not notice any change in brightness. I'll check it at night with and without the resistor in place and give you my opinion.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

I tried a few resistors. First, at the light, any resistor is only evident at the light, so you'd need to do this for each light (right and left).
a 6 ohm resistor in series had no noticeable effect. I then put two 6 ohm resistors in series and also the lights still showed about as brightly (in its dim setting). I was able to notice a difference in total brightness at maximum, compared to the other side with no resistor(s).

Apparently it's not enough to add some resistors for LEDs not to show, and if you eventually add enough to dim it, you're going to impact normal brightness too.

For info, I used aluminum heatsink 6 ohm (50 watt) resistors (orange metallic resistors) designed to be used in parallel with LEDs to prevent the fast blinking. They did not get hot during my tests.
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Yes, you put the "resistor" in parallel with the bulb. In this case I have 2 6-Ohm resistors that I turned into 1 12-Ohm resistor by wiring them in series. I did this by simply attaching 1 wire from each resistor together. Then the 2 remaining wires are the 2 that hook up in parallel the same way you would a single 12-Ohm resistor - in parallel across the bulb.

I'm really tired tonight and I have to be running around between midnight and 4 to catch the Perseid meteor shower. I took the whole week off to be able to see it. All I saw Tuesday morning between 2 and 4 were about 5 meteors. Tonight is supposed to be more vigorous. I hope so since the next 2 nights look like we'll be socked in with clouds!
 

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Re: Chevrolet Malibu Reverse/Backup LED Bulbs! Plug & Play! Big Increase in Visibilit

Update:

I had 4 of these resistors. I tried one in parallel. It worked, but it got very hot, and the lights were noticeably dimmer when on full. The good thing is that this worked for both lights simultaneously, so no need to do this to both sides. I tried progressively more resistors until I used all four in series across the light and that worked with no noticeable heat from the resistors. I duck taped them together and bound them to the cable with all of the wires leading to the trunk, put everything back together and it's seamless. Everything works as expected and the lights are plenty bright when wanted, not on at all when they're not supposed to be.

BTW, my research here revealed that this is a common issue for all chevy and maybe all GM vehicles, so the OP may want to note that.

Thanks!
 
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