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No​ize Boyz​

 Custom Car Audio and Video


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Posted by Chris Hine on December 17, 2015 at 11:15 AM

The two types of lights in today’s arena are LED and HID. LEDs have gotten a great deal of attention lately, but do they really have what it takes to outperform the tried-and-true favorites in the HID category? Let’s find out…




In the past, HID lights were often the go-to choice in applications where a large amount of visible light was needed in a sizeable area. For instance, they’re often found in streetlights, gymnasiums, stadiums, warehouses, and in high-ceilinged buildings. HID lights, however, are not a perfect solution as the light they produce isn’t always pleasing to the eye and many require an extended warm up time. Thanks to technological advancements, LEDs are now a viable alternative in many HID applications – although, they also come with their own set of pros and cons.




Before we get into the advantages and disadvantages of HIDs and LEDs, let’s first get a better idea of what we’re dealing with by reviewing how each light operates.


Light Emitting Diodes (LEDs)


Unlike incandescent bulbs, which use a filament, or CFLs, which rely on gas, LEDs create light by exciting electrons. Inside each LED bulb is a semiconductor material consisting of positively and negatively charged parts. When the light is turned on and an electricity strikes the semiconductor, electrons become charged and begin to flow from a negative to a positive layer within the semiconductor. As the excited electrons pass through “holes” in the material, they emit photons of light and cause the LED to illuminate.


High Intensity Discharge Light Bulbs (HID)


HIDs are a class of gas-discharge arc lamps that form light by transmitting an electrical current between two electrodes and an ionized gas. The light radiates from the arc when charged electrons change orbit as they interact with the gas. All is hermetically sealed inside a quartz glass capsule. Generally, an extra gas is also used, which helps to distinguish the main types of HIDs: sodium, mercury, and metal halide. Every HID requires a ballast to regulate its power and to create the initial surge of electricity that allows the light to start. These lamps are known for producing greater illumination than halogen bulbs while consuming less power.


Now for the pros and cons…HIDs & LEDs Compared


HID - Energy Efficiency 100+ Lumens/Watt (note: This is advertised lumens per watt, which isn’t always what it seems. Explanation below).

LED - 100+ Lumens/Watt


HID - Fragile – has moving parts, glass bulbs, and filaments

LED - Heavy-duty – has no electrode or filament, shock & vibration resistant


HID - 15,000 to 25,000 hours

LED - 100,000 hours

Lumen Depreciation

HID - Moderately high

LED - Low

Cold Tolerant

HID - - 40 F

LED - -30 F (instant on)


HID - Requires 5-10 minute warm-up time, creates light in all directions

LED - Turns on instantly, no flickering, creates focused light

Color Temperatures

HID - Few Options (3000 to 5000 Kelvin)

LED - Multiple Options (2700 to 6500 Kelvin)

Color Rendering

HID - 5 to 93 CRI

LED - Average 80 to 85 CRI


HID - No

LED - Most


HID - Usually 1 to 2 years

LED - Usually 5 years


HID - Lower upfront cost, but requires regular relamping and ballast replacement

LED - High upfront cost but virtually no maintenance expenses



As noted in the energy efficiency section of the chart, you can’t always take a lamp’s advertised lumens per watt (Lm/W) at face value. This is because there is no standardization in the labeling process, so some manufacturers may print the mean Lm/W while others list the initial Lm/W. The problem with making a purchasing decision based on the initial rating is that number can diminish over time, and other factors can also reduce a lamp’s efficiency.

For instance, while most HIDs appear extremely efficient, not all their lumens actually make it outside the lamp, as some of the light is trapped inside or reflected back from the protective covers. Efficiency also decreases in cold weather or when using ineffective ballasts. Furthermore, after 8,000 hours of use, most HID lamps will lose about 20% of their lumens per watt while LEDs will still be operating at nearly 100%.


The bottom line is, while HIDs may advertise 100+ Lm/W, most are lucky to get 60 Lm/W.




In this matchup, LEDs come out the winner in four major areas: efficiency, lifespan, durability, and low maintenance. However, there are still some instances where an HID is still a smart choice. For example, HIDs make sense for temporary low cost lighting, if you want to match existing ballasts and fixtures that are still in good shape, or if strong multidirectional light is your primary goal.

On the other hand, LEDs can save you money over the long-term, require no warm-up (can be turned on and off regularly), have no toxic chemicals, and don’t emit UV radiation (like some HIDs). Although, LEDs don’t have quite the multidirectional illumination as HIDs, their technology is advancing all the time and their many other benefits often make them worth the compromise.

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