All commercial property owners should be considering converting over to LED. Outdoors, they may have metal halide shoebox lights that are consuming 400W to 1000W each, and so installing new LED outdoor lights in their parking areas makes sense, right?
So what do you need to know? What should you consider? How do you get started? There’s a lot of information out there.
New or retrofit?
How many LED watts do I need to replace these lights?
This simple guide helps you walk through the steps and questions you need to ask yourself on upgrading your parking lot lighting to LED.
1. Do you need to upgrade your parking lot lights to LED?
To answer this question you have to understand what your payback is. Payback is a simple calculation that determines, based on the savings, how long it will take you to recoup your investment. There are many things to take into account to determine your actual cost. These include:
cost of the fixture.
cost of installation.
cost of disposal of your existing fixtures.
amount of rebate your utility company will provide you to convert over to LED
How do you calculate your savings? First you have to understand:
The current wattage of your fixtures, including ballast draw. This is a simple calculation. Take the wattage of the bulb and multiply it by 1.15. That will give you the power consumption of each fixture.
Your cost of electricity. It’s your cost per kw/h, which typically ranges between .06 to .30.
How many hours a day do you run your lights? 3 hours? 12 hours? 24 hours?
Follow some simple guidelines:
If your cost per kw/h is high, then it may make sense to convert.
If your hours of usage is high, then it may make sense to convert.
If you are getting a good rebate from your utility, then it may make sense to convert.
If you have a combination of the above items, then it probably makes very good sense to convert to LED.
2. Are there existing lights or do you need to add lights?
If you already have existing lighting, converting to LED will be a lot simpler and less costly. The reasons are obvious. You can reuse existing poles and if you retrofit, existing fixtures. You do not have to rewire.
Converting to LED will actually put less demand on your existing circuits.
If you are thinking about adding light to an area, you will have to add poles, wiring to service the poles, and permits.
Using a quality general contractor or electrical contractor in your area will help you manage the new project
So what information do you need to gather before you start your project?
- What type of fixture do you have? If you are not sure, take a picture.
- How is this fixture mounted? To a pole, to a wall? What is the fixture mounting type? Slip fitter? Trunnion? Unsure? Take a picture. A good LED sales person should be able to instantly identify what you have.
- What type of light bulb do you have? Metal Halide, High Pressure Sodium?
- How many watts? 400W? 1000W?
- What is the line voltage? 277V? 480V? Single phase or three phase?
- What is your cost of electricity?
- Which is your utility company?
- How many hours a day do you run your lights?
- Do you currently use controls, like photocells or timers? Would you like to? This can save you even more money.
- How do you feel about your existing lighting? Good enough? Too bright? Not bright enough? All this can be addressed with the new solution.
- How good are your existing fixtures? Will they last another 10 years? Maybe retrofitting makes sense for you.
3. Understanding parking fixture mounting options
Understanding how your fixtures mount to your existing poles and walls is paramount to converting over to LED.
Nothing is more frustrating than getting your lights out to your facility only to find out you need a slip fitter but thought you had a trunnion mount. The electrician will have to leave, reschedule and you may need new lights or replace the mounting on the lights ordered. Knowing what you have, and ordering the right parts, will save you time, money and aggravation.
This type of mount allows for the fixture to be mounted on a bull horn. The slip fitter inserts onto the tenon. Tenons tend to be around 2 3/8″ in diameter.
This type of mount bolts to a pole, and arm or a wall. These are associated with flood lights. The trunnion adjusts to accommodate different installation needs. Sometimes, this is also referred to as a yoke mount.
This type bolts to a light pole. There are adapters for round poles as well. Poles that accept straight arms are typically pre-drilled to match the bolt pattern of the straight arm.
4. What distribution pattern should you consider?
You can add optics to your parking fixture to change the distribution of the light to best suit your needs. So how do you choose which one is best for you?
Before purchasing, you can actually model your area with photometric software. This software allows you to model lighting layouts using different lights and different optics. These light designs allow you to determine which light and which optics provide the best light distribution for your area.
It is very common for parking lot fixtures to be equipped with common Type 3 or 5 optics. These optics allow for light to be distributed in different patterns between lights.
Type III Area Lighting Distribution – Type III distribution for general roadway lighting applications and parking areas. Its throw is taller than Type II but its side to side throw is shorter. They are great options to mount on the perimeter of a parking lot
Type V Area Lighting Distribution – Type V produces circular distribution that has equal light distribution at all positions. This distribution has a circular symmetry of foot candles. It is great for parking areas or flooding large areas of light in front of the fixture. It is common to use Type 5 distribution in the middle of parking lots to the light is distributed evenly in all directions.
Parking Lot Lighting Plan – Free
We offer Free Parking Lot Lighting Plans. Why? Because lighting plans provide you with light and distribution levels for your commercial parking lot or area. This essentially removes a lot of the risk in purchasing LED.
5. New fixtures or retrofit your existing fixture?
When you buy a new fixture, it includes everything to replace your existing fixture, including a new arm, trunnion or slip fitter bracket. You are essentially replacing the entire fixture with a new LED fixture.
But what if your fixtures are in good condition? Or you spent a lot of money on a particular fixture and want to maintain that look but still want to convert to LED? Can you?
Yes you can. It’s retrofitting. Retrofitting is replacing the old light engine with a LED light system inside your existing fixture. It is a bulb and ballast replacement.
But is retrofitting good? Is it safe? Will it last as long as a new LED fixture?
Yes. Our parking light retrofits are ETL approved. They are DLC Premium Qualified, so they are very efficient and are eligible for rebates from utilities.
New fixture or retrofit – what option is best for you?
What’s the best option for you? There is no right or wrong answer, only the best solution. You have to take everything into account.
cost of fixture / retrofit
size of rebate
condition of your existing fixtures
cost to install versus retrofit
cost to dispose
Want help? We do this all the time. We have both options available. Unlike some companies that sell one or the other, we are not biased to sell one as a better solution over the other, rather, only what’s better for you.
Retrofit or Replace 400W Metal Halide Shoebox
150W LED Shoebox Retrofit Kit - 24750 lumens - replaces 400W Metal Halide and HID
$195.36Contractor / Bulk PricingSku: MLLG-LED-RETROSB-16-150-50 - 1594Lead Time: In Stock 2-3 Business DaysReplaces: 400 Watts HIDWatts: 150Life: 50,000 (L70) hoursLumens: 24750 • LM/W: 165Warranty: 5 yearsVoltage: 100V-277V | 277V-480V
120W Shoebox LED Light - 20400 lumens - replaces 400W HID$224.29 Contractor / Bulk PricingSku: MLLG-LED-SBHO-120-[Color]-[Mount] - 1355Lead Time: In Stock 2-3 Business DaysReplaces: 400 Watts MHWatts: 120Life: 100,000 (L70) hoursLumens: 20400 • LM/W: 170Warranty: 10 yearsVoltage: 100V-277V
Retrofit or Replace 1000W Metal Halide Shoebox
240W LED Shoebox Retrofit Kit - 39600 lumens - replaces 1000W Metal Halide
$326.48Contractor / Bulk PricingSku: MLLG-LED-RETROSB-23-240-50 - 1595Lead Time: In Stock 2-3 Business DaysReplaces: 1000W Metal HalideWatts: 240Life: 50,000 (L70) hoursLumens: 39600 • LM/W: 165Warranty: 5 yearsVoltage: 100V-277V | 277V-480V
240W LED Shoebox - 42000 lumens - replaces 1000W HID$370.64 Contractor / Bulk PricingSku: MLLG-LED-SBHO-240-[Color]-[Mount] - 1356Lead Time: In Stock 2-3 Business DaysReplaces: 1000 Watt MetalHalideWatts: 240Life: 100,000 (L70) hoursLumens: 42000 • LM/W: 170Warranty: 10 yearsVoltage: 100V-277V
6. What LED wattage should you choose?
Watts is a bad way to think about this. You need to think about lumens. Lumens are the amount of light one fixture produces. Watts is the amount of energy a fixture consumes to produce lumens, or light.
And each fixture does it differently. Some LED products are far more efficient than others in producing light using less energy. That’s why you are converting.
There are a few ways to tell which are the more efficient lights.
- Check out lumens per watt on the cut sheet. If they don’t advertise this, then take the total number of lumens the fixture produces and divide it by the total number of watts it consumes. That’s your number.
- If it’s below 110 lumens per watt, chances are you are looking at very old LED technology.
- A good target is 130 lumens/watt or better. We sell retrofits, for example, that are as high as 165 lumens/watt.
- Look at the DLC qualification. If it doesn’t have one, this is not good option. If it says DLC Premium, this is the highest efficiency qualification. A standard DLC symbol means it is not as efficient as a DLC Premium product. Utilities usually give bigger rebates for DLC Premium. It may cost a little more for a DLC Premium product. But, the rebate will also be larger resulting in more cost savings.
How many lumens do you need to replace:
250 watt metal halide – 9000-12000 lumens is good.
400 watt metal halide – 14000 to 20000 lumens is good.
1000 watt metal halide – 36000 to 50000 lumens is good.
What does this translate to in terms of watts?
110 lumens / watt, you need:
- 90W to produce 10,000 lumens.
- 181W to produce 20,000 lumens.
- 454W to produce 50,000 lumens.
130 lumens / watt you need:
- 76W to produce 10,000 lumens.
- 153W to produce 20,000 lumens.
- 384W to produce 50,000 lumens.
160 lumens / watt you need:
- 62W to produce 10,000 lumens.
- 125W to produce 20,000 lumens.
- 312W to produce 50,000 lumens.
Replace 150W HID
Replace 250W HID
Replace 400W HID
Replace 1000W HID
Parking Lot Retrofit
7. What is the best color temperature? And what is CRI?
One other item you need to consider is color temperature. What is it? Color is measured on the kelvin scale. For purposes of this discussion, there is a predefined range you should consider. This range starts at about 3000K and extends to 6000K.
So what does this mean? Color temperatures on the left side of the scale tend to produce white light with yellow or warm tones. Colors on the right side of the scale tend to produce white light with bluish tones.
You are likely going to select one of two common color temperatures used in 99% of outdoor applications, 4000K or 5000K. 5000K tends to mimic metal halide quite well.
What is CRI?
CRI (Color Rendering Index) is a measurement of quality of light. Lumens are quantity, and CRI is quality. For example, if you ever stood in a white shirt under High Pressure Sodium, your shirt looked yellow. Its quality of light is poor, and it tends to color everything. Its CRI is somewhere around 20, on a scale of 1 to 100. If you stand under a LED Light with a CRI of 80, your white shirt will look white.
What CRI should you select? We recommend 70+. You do not need 90 CRI. Remember, this is a parking location, not a television studio where color rendering is important.
8. Rebates – can save you money when you purchase
9. How long is the warranty? Who will help if there is a problem?
If you want to know how good a manufacturer thinks their light will work, here’s what you need to do.
Check the length of the warranty. A product with a two year warranty is not designed to last long. All DLC qualified products have 5 year warranties.
Read the warranty. Some manufacturers promise long warranties, along with some clever small print that makes it next to impossible to make a claim.
Check the Better Business Bureau. Sometimes companies find clever ways to not honor their warranties. They make claims such as ‘Installation Error’ as the reason the lights failed. Make sure you work with a reputable dealer. We often get calls from customers with failed lights with warranties that are not honored.
Online purchases – buyer beware. Some no name online companies sell products with 30 day return policies and with warranties if the product fails. Who is the company behind those warranties?
The problem is you don’t have a relationship or a phone number of a person you can call if a driver fails. So, be careful of what you buy and where you buy it. You need these lights to work, and work for a long time, and someone who will be there to help if an issue arrives.
10. Two energy saving controls for your parking fixtures
Photocells for dusk to dawn operations
Motion Sensors and Dimming
How many lumens do I need for a parking lot?
We have found that a range between 15,000 and 25,000 lumens to replace 400W HID and 40,00 to 55,000 lumens to replace 1000W Metal Halide are the best lumen ranges for parking lot lights. The real answer lies in performing a photometric study for your area, which we provide for free.
What are the best color temperatures to use for LED Parking Lot Lights?
The two most popular is 4000K and 5000K. 5000K is a good replacement for Metal Halide. Many states have rules that only allows for 4000K or lower.
What are the best optics to use in LED Parking Lot Lights?
By far, the most popular are Type 3 and Type 5. If you’re unsure which one is best for you, we can run a free photometric to show you which optic and lumen package works best for you. Keep in mind, choosing the correct optic can make a dramatic difference to the end result of your parking lot. Using Type 5 optics in the middle of a parking lot provides great area distribution. Using Type 3 on the edges of a lot ensures the light ends up in the lot and not the area directly behind the light.
What kind of lights are in parking lots?
The most common lights is a shoebox light. Shoebox lights have been a standard parking lot fixture for decades. Before LED, they were powered with Metal Halide and High Pressure Sodium bulbs. Since LED, Shoebox Lights have become more stylish, appealing and thinner.
Visitors, potential customers, and employees shouldn’t have to be in fear while going shopping, parking for an event, going to the beach, or even going to work. For this reason, we find that the outdoor lot can lead to many potential hazards.. if the outdoor lot owner allows for such vulnerabilities.
The number one cause of crime in an outdoor lot is caused by low security, and unlit areas contribute heavily to this. A dark outdoor lot doesn’t allow for cameras to pick up all the activity as clearly as it should.
Additionally, unintentional accidents can occur simply by not being able to see everything that is going on. Thus, we think it is up to the owner and manager to prevent accidents (both intentional and non-intentional) from occurring and the first part of the equation to doing so is by ensuring the area is properly illuminated.
As we briefly described above, here are all of the potential dangers that a dark outdoor lot can potentially cause:
1. Car accidents
Whether it be with another car, an object, or a human; the odds of crashing are much more likely if you are unable to properly see. For obvious reasons, this is not a desirable outcome for a outdoor lot; especially if it could potentially bring the lot owner liable to the accident.
Think about it, if you are unable to detect movement due to lack of light; it is much easier for people to hide and move around without you, or even the security team, to know about it. For this reason, having adequate light in every corner of your property that visitors will be in is paramount to the safety and security to all of your visitors.
Additionally, car thefts and break-ins can be higher when under lit areas are an issue. To resolve this, you need to improve your lighting design which will, if done right, will allow you to meet the lighting requirements for outdoor lots.
3. Personal injury incidents
Not only are other people a potential hazard to your visitors, but your property may be of hazard to them as well. By maintaining proper lighting levels, you can cross this one potential liability off of your list.
How to Properly Illuminate Your Outdoor Lot
For those of you reading this who own an outdoor lot, here we will explain a little bit about some benefits you will gain, along with how to start the process of getting proper light fixtures in your car lot.
(Note: If you aren’t an owner of property with an outdoor lot, don’t forget to share this with someone who does!).
For starters, we recommended a lighting technology that will provide proper lumen output throughout its entire lifespan. For this, LED is the technology to go with. Reason being? It maintains high lumen output throughout its life, unlike other technologies such as metal halide which output much less light near the end of their lifespan. So while LED does slowly depreciate in light output too, it is much slower and overall less. Here are some other main benefits that you will realize by converting to LED lights.
1. Less energy usage
LEDs are known to be virtually the most efficient lighting technology around. And since parking fixtures typically use a lot of lumens, and thus wattage, by converting to LED you will be able to use much less wattage to achieve the same (if not better) light output. In fact, you can realize a reduction in energy by up to 75% in some cases.
2. Longer lifespan
Since parking fixtures are typically high up in the air, it can get expensive to change them out every time they burn out. With LED you will be able to realize 2-3 times longer lifespans, which will allow you to stop buying so many replacement lights. In addition, you will be able to stop paying someone to change them out as often, which is another commonly overlooked benefit of LEDs.
3. Lower lumen depreciation
Like we discussed earlier, lumen depreciation is an especially important topic with Metal Halide and High Pressure Sodium lighting more-so than with any other lighting application. For example, consider a metal halide or HPS light fixture. Near the end of its life, it might be outputting only 50% of the original light that it did when it was near.
On the contrary, a LED Lights might only have lost 15% of its light output. With LED, you typically will not run into situations of under lit areas in your car lot like you would with Metal Halide or High Pressure Sodium lights.
These are only a few of the many benefits of LED Lights, but these are certainly the main ones that most outdoor lot owners have told us were the biggest benefit that made them make the switch.
Want to learn more about lights that can brighten a dark area?
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