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1) AC (Alternating Current) vs DC (Direct Current)

Both types of ballasts take the DC power from vehicles to power the HID bulbs for light. The difference in these ballasts is in the type of electricity being outputted to the bulb. AC ballasts output AC power, while DC ballasts output DC power. By converting DC to AC via the ballast, the load on the system is not a full 12V which gives substantially better life to the HID bulbs and ballasts. Aside from that, AC ballast systems are brighter than DC ballast systems. Due to the HID market being as big as it is, many companies knowingly sell DC kits to unsuspecting consumers in order to lower their prices and increase their profits. Unlike our competitors, we only carry AC HID kits to ensure proper life span and maximum light output.

2) 35W vs 55W Ballasts

35W HID kits will provide roughly 35% more light than current halogen bulbs*. 35W HID kits will fall in line with bulb color on the Kelvin scale. While 55W HID kits provide more light (about 40% more than 35W HID kits), the trade-off is that due to this higher light output, the lifespan of both bulbs and ballasts are noticeably shortened due to the extra heat coming off the bulb**. Depending on your application, the extra heat created from 55W kits, may cause issues for vehicles with plastic lenses, projector lights, etc. While 35W HID kits have an average usage of 3000-4000 hours, a 55W HID kit can drop the usage to 1500-3000 hours. Some people use the 55W ballasts to overcome the light out warning indicators on vehicles with a canbus system, but this is not a guaranteed solution.

*Dependent on bulb color.

** Due to the bulb burning brighter and washing out the color when ordering a 55W HID kit, you will need to purchase bulbs 1 shade higher on the Kelvin scale in order to get the color you desire

Ex: If you wish to have a 5K color with a 55W kit, you will need to purchase a 6K bulb. If you wish to have an 8K color, you will need to purchase a 10K bulb.

3) Digital vs Analog Ballast Differences Clarified




Output Power Fluctuations

35W ± 2W (ie. 33W - 37W)

Analog ballasts rely on coils, resistors, and capacitors to transform the DC power from your vehicle to AC power. Analog ballasts cause fluctuations in the output of power to the HID bulbs. Due to these fluctuations, bulbs have a shorter life span.

35W ± 0.5W (ie. 34.5W - 35.5W)

Digital ballasts also converts DC power from vehicles to AC power, but also have added DSP chips in order to improve the stability of power throughout the system. With smaller fluctuations in power, bulbs will reach their potential lifespan.

Wave Bands


An analog ballast connected to an oscilloscope shows the fluctuation in power output to the bulbs.


A digital ballast connected to an oscilloscope shows the constant power output to the bulbs.

Visual Light Output

Analog ballasts rely on its components producing AC power. With analog ballasts, the power produced fluctuates as different electrical components are turned on and off. This has been known to cause HID bulbs to dim and fail prematurely.

Digital ballasts filter DC power coming from vehicles and outputs clean AC power to the HID bulbs. The light produced is generally sharper in appearance and more consistent in color & output while increasing longevity.


Power fluctuations from vehicles shorten the life of the product.

DSP chips clean & filter all the fluctuations in power before converting the DC power to AC giving components better chance of living its true lifespan.


285 Viking Ave. Brea, CA 92821 United States 714-470-0989

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