LED vs Metal Halide Lighting Nine Reasons LED Wins

By Accent Led Lights

Wed, Aug 29, 2018

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Let's take an over view at the information given on a typical 400 watt metal halide bulb. Generally the specifications tends to vary, a simple look towards a popular online website selling Metal Halide bulbs, will show how a brand new bulb has got the following given specifications:

 

4000K is Color Temperature

32,000 to 36,000 is Initial Lumens

20,000 is Life Hours


The mean lumens for a 400W Metal Halide in A recent white paper by the Dark Sky Society rated to be 20,500 lumens. It has the life expectancy to be around 15,000 hours. One needs to stick with the numbers they are familiar with, for purposes of this discussion. 
Below given has a lot of interesting information to look at. In reality, Initial lumens are a very high number to look at. Settling in at a lower lumen output rather quickly, a Metal Halide bulb by starting off very brightly later then drops the lumens very fast. In the first 6 months alone it is quite common to lose as much as 20%. Within 6 months period, while 36,000 lumens sound impressive, it can go under 30,000 lumens. Metal halide bulb is relatively quick as a Lumen depreciation given. Around 8,000-10,000 hours, it is noted that at half-life of the bulb, lumen depreciation is already at 50%. 


 

2. Operating Life

The operating life of a typical Metal Halide bulb as mentioned seems to be around 20,000 hours. Like a 1000 watt Metal Halide Larger bulbs, work around 15,000 hours. There are different ways suppliers describe the life of the product In terms of LED solutions. One given solution is to mention L70. L70, it is a measurement of lumen degradation up to 70% of initial lumens but is not a measurement that is the last end. Some other component might fail prematurely like the driver or ballast.

The life of a Metal Halide bulb is around 15,000 to 20,000 hours is what we are aware of. It has already lost 50% of its initial lumens is what we are also aware of. So highly ineffective while not dead, the record is that it still consumes 400+ watts even if it is half as bright as the other. 


 

3. Efficiency (lumens/watt)

Energy savings is the pre-cursor to the next topic, but the basic premise is that, the more efficient the bulb is it tends to save more money. So let's calculate the lumen efficiency of metal halide versus LED. 

One needs to take the total lumens produced to calculate lumen efficiency, and divide it by the total watts consumed. One also has to include ballast draw In the case of Metal Halide. It is around 455 watts if the total watts recorded that is consumed of a typical 400W bulb. Over and above the bulb consumption the ballast consumes energy about 15% more. 


 

4. LED vs Metal Halide Energy Savings

Something important was pointed out in the above discussion. Above mentioned is 400W the mean lumens of a Metal Halide to be around 20,500 lumens. 23,250 lumens are produced by our 150W retrofit kit; it consumes only 150 watts instead of burning 455 watts. This represents savings in energy consumed up to a 66% to produce more light.

 

 5. Savings on Maintenance

Wanting to convert to LED We has just as many customers because of maintenance savings that they do to save energy. Over the life of the LED product, thinking about what we have already discussed. The higher the cost of replacement is when the higher the installation height. And this becomes a significant budget amount every year if you have a facility loaded with lights that you must take into consideration. Now reduced maintenance time on lights as we know, does not translate into dollars saved due to its highly unlikeable property. People will more likely lose their jobs over the fact there is much less work to do.

 

6. Quality of Light

It reads lumens when you take a measurement of light with a light meter. At that location creates a measurement called foot candles this measurement of all the lights that contribute to the light. That light that is being measured let’s think about that. In all spectrum's, visible or otherwise Metal Halide creates all sorts of light. , visible to the measuring device but not visible to the human eye this includes UV and IR spectrum's. On the other hand, LED does not produce UV and IR. Thus, it is known for the readings using the same light meter which is only picking up visible spectrum's. 
 

7. Photopic vs Scotopic Lumens

even the discussion of photopic vs scotopic lumens Many years ago was perceived as voodoo magic talk. As many who discounted it there were those who believed in the difference and. how we perceive light vs how a camera or light meter perceives light is a discussion to consider. light is a big part of why we are able to see  and It is true people are able to see. You will quickly understand how important light is once you Walk into a dark bat cave. Rods and cones is what our eyes consist of, to see colours and perceive objects at night is how they work. It is harder to see colours in the dark You will notice that. Our eyes work in this manner. There is different working of Cameras and light meters they detect light in a totally different way .

 

8. Rebates at time of purchase

The mean lumens for a 400W Metal Halide in A recent white paper by the Dark Sky Society rated to be 20,500 lumens. It has the life expectancy to be around 15,000 hours. One needs to stick with the numbers they are familiar with, for purposes of this discussion. 
Below given has a lot of interesting information to look at. In reality, Initial lumens are a very high number to look at. Settling in at a lower lumen output rather quickly, a Metal Halide bulb by starting off very brightly later then drops the lumens very fast. In the first 6 months alone it is quite common to lose as much as 20%. Within 6 months period, while 36,000 lumens sound impressive, it can go under 30,000 lumens. Metal halide bulb is relatively quick as a Lumen depreciation given. Around 8,000-10,000 hours, it is noted that at half-life of the bulb, lumen depreciation is already at 50%. 


 

9. New versus Retrofit

Wanting to convert to LED We has just as many customers because of maintenance savings that they do to save energy. Over the life of the LED product, thinking about what we have already discussed. The higher the cost of replacement is when the higher the installation height. And this becomes a significant budget amount every year if you have a facility loaded with lights that you must take into consideration. Now reduced maintenance time on lights as we know, does not translate into dollars saved due to its highly unlikeable property. People will more likely lose their jobs over the fact there is much less work to do.

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