New Contact Information....

hovey lighting contact information led lighting resized 172

FREE eBook

FREE Case Study


...Or Via Social Media

Subscribe Here For New Blog Article Updates

Your email:

Current Articles | RSS Feed RSS Feed

How To Calculate Watts For Metal Halide (HID) Lighting


Why Do I Need To Know The Wattage Of My Metal Halide Fixtures?

The only way to see if an energy efficient update to your facility makes sense is to calculate the cost of what you already have.  Your electric bill won't tell you this because the bill is a aggregate view of all of the electricity consumed from your facility, not just the lighting.

By calculating the cost of your existing fixtures, you are able to make educated decisions regarding upgrades to energy efficient lighting products. 

Here are the 5 steps involved with calculating the total wattage of HID lighting fixtures because this is what we see most when visiting customers.  Here are the steps you need to follow:

Step 1 - Determine Your Type of Fixture

This article assumes that you are aware of your metal halide fixtures.  But if not, here is what you need to be looking for:

The Bulb:

Metal Halide Bulb

250 Watt Metal Halide Low-Bay

400 Watt Low Bay Metal Halide

400 Watt Metal Halide High-Bay

High Bay 400 Watt Metal Halide


Step 2 - Determine the Size Of Your Metal Halides

What Is A Size?

Size, when talking about Metal Halide, the size actually refers to the wattage of the fixture.  So you likely have 175 Watt MH, 250 Watt MH, 400 Watt MH or 1000 Watt MH.  While the size indicates the wattage, it is not the actual wattage of the fixture ( I will explain in Step 4...)

Where To Find Your Size

Supply Room

Metal Halide come in many shapes and sizes.  One of the easiest ways to find out the size of your fixtures is to look on the supply room shelf.  You likely have a replacement bulb in there somewhere under a layer of dust. 

Maintenance Staff

If you have a maintenance person, they will be able to tell you what size of Metal Halide you have. Metal Halide are typically very high maintenance and if light quality is important to what you do, you have likely order either bulb or ballast replacements in the past year. 

Get A Ladder!

Climb on up there and get the number, that is if your comfortable on the ladder and you are not too high up.  Be careful, make sure someone spots your ladder and be sure to let them cool down.....these babies heat up to over 900 you won't want to be using the fixture as a balance point!

Hire A Professional Electrical Contractor

If you want to do your own calculations, but want to be exact, bring in your Electrical Contractor.  They work with these types of fixtures all the time.  An hour or two walking around your facility will give you a pretty good idea what you have. 

(TIP: Depending on the contractor, they may not be too excited about energy efficient products.  Contractors are typically a little slow to change, so if you get this sense, just let them know you want help with determining what you have.  Learn more about How Contractors Are Afraid Of Energy Efficient Products in a post I did earlier this week. If your in Michigan, Tennesse or Kentucky, we can help you out!)

Step 3 - Need Your Fixture Quantity

If You're Just Seeing If It Is Worth Pursuing, Just Get it Close

If you are just doing rough numbers for now, you can get a rough estimate simply by counting your fixtures.  If you already have a close number, then just use that at this stage.

If You're Ready To Submit Paperwork For Rebates, You Need To Be Exact

If you are getting ready to submit paperwork for a utility rebate, it is in your best interest to get an exact count. Most programs pay you for each fixture or total kilowatt reduction.  To get the most rebate amount, get some help counting. 

We have had 3 different people count in some facilities and each of us come up with a different number.  You may have to count a couple of times. 

The point here is you need a quantity that is close to work with to do your final calculation.

Step 4 - Determine Actual Wattage

Just because your Metal Halide is 175 Watt or 400 Watt, that doesn't mean that is the actual wattage of the fixture.  I guess it is easier to say 400 Watt rather than 458 Watt.  Here are the ACTUAL wattages of the most common types of Metal Halide that we see.

  • 175 Watt Metal Halide  Fixture = 205 Actual Watts
  • 250 Watt Metal Halide Fixture =290 Actual Watts
  • 400 Watt Metal Halide Fixture = 458 Actual Watts
  • 1000 Watt Metal Halide Fixture =1,081 Actual Watts
When doing your energy efficiency calculations, you will want to use the actual wattage to get an accurate picture of what you can save potentially on your energy bill. 

Step 5 - Multiply Quantity x Actual Wattage

Let's say you have (100) existing fixtures and you have determined they are 1000 Watt Metal Halide:

100 fixtures x 1,081 Watts = 108,100 Total System Watts (Assuming this is the only type of fixture you have...)

Step 6 - Compare Existing Total Watts With Proposed Total Watts

If you are considering an energy efficient upgrade, you should see a major difference in wattage consumption.  In this case, one alternative technology we would look at is inductive fluorescent.  We could easily replace the 1000 watt Metal Halides with 250 Watt inductive fluorescents.  Here is how we would compare:

100 (New Fixtures) x 265 Watts = 26,500 Total System Watts. 

Step 7 - Compare Old With New

Old Total System Watts - 108,100

New Total System Watts - 26,500

Wattage Reduction New System = 81,600 Watts

In this case, you would be reducing your total system wattage by over 80% which will translate into a significant amount of savings over time.  This may seem unbelievable to you but it's true and we wrote an article about the project titled:Energy Efficient Lighting for Dealerships and Large Parking Lots

Want To Learn More About Energy Efficiency

1. Read Some Related Blog Posts

We write extensively about different energy efficient technologies and how to calculate your energy efficient savings.  Here are a few suggested articles:

Learn How Watts Can Improve Energy Efficiency; "Watt's" a Watt?

Metal Halide:The "Shocking Truth" In The Life Of A Metal Halide Bulb

Types Of HID Lights And Replacements For |Energy Efficient Lighting| 

2. Or...Download Our Free E-book: Business Owners Guide To Energy Efficiency

The concept of energy efficiency is often mis-understood as a gimmick or scam.  We have created an e-book to help dispel that type of rhetoric.  The purpose of the book is to show you how you can see significant savings with new, updated energy efficient technologies. 

Download a copy to learn about the benefits of energy efficient technologies for your business. 



Attempt 8 Pieces: The website is perfect for traditional as well as most recent free of charge leather-based fake chanel. This sells leatherworkers in order to other areas on the internet exactly where they are able to discover additional tasks to complete. You will find additional web sites on the web that provide a person free of charge leather-based designs. Other people provide you with free of charge hyperlinks in order to additional weblogs as well as Web sites which show free of charge gucci replica. You will find absolutely no excuses you can provide with regard to not really pursing your own leathercraft pastime or even profession. Right now you realize several locations and you'll discover leathercraft tasks. Look at ideas beneath could use one that choose your own designs: Arrange assembling your project: You won't purchase the proper louis vuitton replica in the event that don't arrange for this. Determining as well as arranging the task is actually the initial step. Possibly you need to make use of leather-based in order to sew the gold coin handbag or even a set of footwear. Would you end up being interested in carving adornments? Solution each one of these queries lunchmoney you should buy the actual patternsAre that you newbie or even a specialist: This is actually the 2nd suggestion to think about. Beginners ought to merely choose tinier as well as simple leather-based designs. Specialists may choose each complex as well as less complicated tasks. A few websites provides you with much more hermes replica as well as directions concerning leatherworks as well as resources required. They offer the design package along with every thing. Designs ought to be transferable: When you go with a good design, discover if you're able to move this somewhere else utilizing a and also carbon document. 
Posted @ Sunday, April 12, 2015 9:36 PM by sdasda
Amazing admissions sign up meet our experts deb russell mathematics deb is an experienced school principal and math teacher, having taught on the elementary, middle and high school level. professional development. Please note that if your organization encompasses less than 200,000 students amazing with her many readers. professional essay writers in our global society. Us news education, best colleges, best graduate schools, online schools - us news. What if you could work hard, get paid, and Englishessaywriter, from application to graduation, with her many readers. 
Posted @ Wednesday, August 26, 2015 5:29 PM by reohempdesmusk1972
заказать футболку в украине, белая футболка футболки мужские футболки мужские
Posted @ Tuesday, October 06, 2015 7:33 AM by футболки мужские
bright t shirts bright t shirts
Posted @ Wednesday, October 07, 2015 3:12 AM by bright t shirts
Thanks for another great post. Where else may  
just anyone get that kind of information in such an ideal manner of writing? 
I've a presentation next week, and I am on the look for  
such info. 
Here is my blog post South Park T Shirts Uk;,
Posted @ Friday, November 20, 2015 12:14 PM by Mitch
My brother recommended I may like this website. 
He was entirely right. This post truly made my day. 
You cann't believe simply how a lot time I had spent for  
this info! Thank you! 
my weblog;
Posted @ Friday, November 20, 2015 8:34 PM by Mira
Hello would you mind sharing which blog platform you're working  
with? I'm looking to start my own blog soon but I'm having a difficult time selecting between BlogEngine/Wordpress/B2evolution and Drupal. 
The reason I ask is because your layout seems  
different then most blogs and I'm looking for something  
completely unique. P.S Apologies for getting off-topic but I  
had to ask! 
Here is my weblog; Foo Fighters Shirt Hot Topic
Posted @ Friday, November 20, 2015 8:47 PM by Ebony
Fabulous, what a webpage it is! This blog provides helpful facts to us, keep it  
Here is my web page - Linkin Park Shirt Hot Topic
Posted @ Saturday, November 21, 2015 10:35 AM by Brayden
Good post. I am experiencing many of these issues as  
Here is my web blog ... The Strokes Shirt
Posted @ Saturday, November 21, 2015 10:35 AM by Russ
Hi everyone, it's my first pay a quick visit at this  
web page, and post is truly fruitful for me, keep up posting these posts. 
Look into my blog post: ledzeppelinshirt2u
Posted @ Saturday, November 21, 2015 10:39 AM by Leonel Peele
Hello! Do you use Twitter? I'd like to follow you if that would  
be okay. I'm definitely enjoying your blog and look forward to new updates. 
Also visit my weblog ... Linkin Park T Shirt Design - -
Posted @ Sunday, November 22, 2015 1:54 AM by Iola Lipscomb
My family always say that I am wasting my time here at net, 
except I know I am getting knowledge everyday by reading  
thes nice posts. 
My web-site :: Foo Fighters Shirts
Posted @ Sunday, November 22, 2015 7:41 PM by Brock
Pretty! This was an extremely wonderful post. 
Thank you for providing this info. 
Also visit my site :: Funny South Park Shirts (
Posted @ Sunday, November 22, 2015 7:41 PM by Vernon
If you would like to grow your experience just keep visiting this web site and be updated with the hottest news posted here. 
Check out my webpage: Led zeppelin Shirt Womens
Posted @ Sunday, November 22, 2015 7:41 PM by Bernie Tomaszewski
Thanks for sharing your thoughts on energy efficient lighting. 
My weblog; Southparkshirtsonline
Posted @ Sunday, November 22, 2015 7:42 PM by Bella
Right now it sounds like Movable Type is the best blogging  
platform available right now. (from what I've read) Is that what you're using on your blog? 
my blog post Eminem Shirts For Women -  
Posted @ Sunday, November 22, 2015 7:42 PM by Gita
Hello would you mind stating which blog platform you're using? 
I'm going to start my own blog in the near future but I'm having a hard time deciding  
between BlogEngine/Wordpress/B2evolution and Drupal. The reason I ask is because your layout seems different then most blogs and I'm looking for  
something unique. P.S Sorry for being off-topic but I  
had to ask! 
Also visit my blog post - South Park T Shirts Cartman (
Posted @ Sunday, November 22, 2015 7:43 PM by Lamar Jean
Greetings! Very helpful advice within this article! It is the  
little changes that make the largest changes. Thanks a lot for sharing! 
my blog: T Shirt Led Zeppelin Vintage
Posted @ Sunday, November 22, 2015 7:43 PM by Shanna
Hi there, constantly i used to check blog posts here in the early hours in the break of day, as i love to learn more and  
Here is my site - Pink Floyd Shirt
Posted @ Sunday, November 22, 2015 7:46 PM by Eliza Pontiff
We are a gaggle of volunteers and opening a brand new scheme in our community. 
Your website provided us with helpful information to work on. You've performed  
an impressive task and our whole group might be grateful to you. 
Feel free to visit my blog ::
Posted @ Sunday, November 22, 2015 7:48 PM by Heidi
Hi, I do think this is a great blog. I stumbledupon it ;) I am going to  
come back once again since I book marked it. Money and freedom is the best  
way to change, may you be rich and continue to help other people. 
my page ...
Posted @ Sunday, November 22, 2015 7:50 PM by Mae Blount
I'm really impressed with your writing skills as well as with the layout on your blog. 
Is this a paid theme or did you modify it yourself? 
Anyway keep up the excellent quality writing, it's rare to see  
a great blog like this one nowadays. 
Feel free to visit my web-site; Led Zeppelin Shirts
Posted @ Sunday, November 22, 2015 7:52 PM by Aja Brewington
Thanks for finally writing about > How To Calculate Watts For Metal Halide (HID)  
Lighting < Loved it! 
Here is my page; Anime T Shirt  
Posted @ Sunday, November 22, 2015 7:55 PM by Lottie
Pretty section of content. I just stumbled upon your web site and in accession capital  
to assert that I acquire actually enjoyed account your blog  
posts. Any way I'll be subscribing to your feeds and even I achievement you access consistently fast. 
Here is my homepage :: Iron Maiden T Shirt Vintage
Posted @ Sunday, November 22, 2015 8:17 PM by Glory Harrington
Pretty section of content. I just stumbled upon your web site and in accession capital  
to assert that I acquire actually enjoyed account your blog  
posts. Any way I'll be subscribing to your feeds and even I achievement you access consistently fast. 
Here is my homepage :: Iron Maiden T Shirt Vintage
Posted @ Sunday, November 22, 2015 8:17 PM by Glory Harrington
Hi to every one, the contents existing at this web site are genuinely amazing for people experience, well, keep up the nice  
work fellows. 
Have a look at my website Womens Linkin Park T-Shirt (Ida)
Posted @ Sunday, November 22, 2015 8:20 PM by Ruth
Hello to every one, the contents existing  
at this web site are genuinely awesome for people knowledge, well, 
keep up the good work fellows. 
Check out my webpage ... Eminem Shirts For Women
Posted @ Sunday, November 22, 2015 8:29 PM by Selene Serna
Its like you read my mind! You appear to know a lot about this, like you wrote the  
book in it or something. I think that you could do with a few pics to drive the message home a little bit,  
but other than that, this is magnificent blog. A great read. 
I'll definitely be back. 
Check out my web blog; Pink Floyd Shirts Hot Topic (
Posted @ Sunday, November 22, 2015 8:35 PM by Reda
I know this web site gives quality depending articles and additional stuff, is there any other website which provides  
such stuff in quality? 
Stop by my blog post ... Anime Shirts For Guys
Posted @ Sunday, November 22, 2015 9:16 PM by Milford
Wow, that's what I was seeking for, what a data! present here at this  
weblog, thanks admin of this web site. 
Here is my blog: Anime Shirt Design (Jackie)
Posted @ Sunday, November 22, 2015 9:26 PM by Shayne
With this, you can also decide on regardless of whether you want the  
artwork to be painted right on your nails or you  
would desire to have it painted on synthetic nails. 
Men and women will be equipped to master some of my  
strategies that will be posted to social media. To apply to the nail, get started at the base of your nail and flatten the bead on the nail,  
then brush it forward towards the tip of the nail. 
Look into my web site :: led gel Polish Brands
Posted @ Monday, November 23, 2015 11:04 AM by Simon
On 06-25-ninety nine I get a letter confirming my ask for for any paperwork filed in my identify that they could be in possession of. 
The script for the races is dependent on previously operate (but not extremely perfectly know) races, so there is frequently a timing issue with getting the  
race phone suitable. Yet another critical point to  
note right here is that criminal offense has no unique definition any these kinds  
of detail which harms a people self respect and hurts a person is termed as  
criminal offense. 
Also visit my website: jasa investigasi
Posted @ Monday, November 23, 2015 11:20 AM by Candice
I am really pleased to read this weblog posts which consists of  
plenty of valuable facts, thanks for providing these information. 
My homepage :: love Couple t Shirt designs
Posted @ Wednesday, November 25, 2015 8:47 AM by Kelsey
These payroll companies help the business firms in maintaining their important data and records of the employees in an appropriate manner. 
Administrative controls are administration procedures and processes made to safeguard towards undesirable staff behavior, which  
includes:. But as they say time is modifying and the environment  
is connecting with each other, which has served in the  
sharing of understanding and methods inside of the  
folks, now persons are much more than eager in looking for help from  
the offered sources around them. 
my web site; the no 1 ladies detective agency (Dollie)
Posted @ Saturday, November 28, 2015 8:27 AM by Chara
Post Comment
Website (optional)

Allowed tags: <a> link, <b> bold, <i> italics