One of the best opportunities to save money is to convert Metal Halide and High Pressure Sodium High Mast lights over to LED. A typical high mast light consists of a tall pole, 50-150 tall and contains multiple fixtures attached to the pole, typically 4 to 12. The lower poles may be equipped with 400W Metal Halide or High Pressure Sodium bulbs, the taller poles typically are installed with 1000W Metal Halide or High Pressure Sodium bulbs.

An important component in your main electrical service panel is commonly known as the breaker. If you’re a homeowner, surely you have visited yours a few times over the years. But what exactly is it? And what does it do? Let’s go over the importance of the breaker and what its doing for your home.

If you read our article on the home electrical system a few months back, you will know which step the service panel comes in receiving electricity for your home. The service panel is the gateway for all electricity in your home. After electricity comes through underground or overhead power lines, it goes to your electrical meter and then to the service panel. Electricity branches off from here and travels to the rest of your home. Within the panel are circuits for different areas for electricity to travel. Shutting down a circuit can cause power loss to a part of the home, maybe a room or two. But because the home is on many different circuits, power can remain active in the rest of the house.

After electricity arrives at the service panel, it travels to a circuit. The circuit is a loop in which electricity travels from one end to the other. The breaker splits up to 100 amps or more into the circuits to distribute the power. Usually each circuit in a common residential home operates at 15 amps. The breaker is designed to “trip” if it receives an excess of electricity. If a power surge occurs on the outside of the home, for example a lightning strike, the service panel will stop the flow and turn off. If a surge happens on a circuit within your home, the breaker will also shut down that loop to protect the rest of the house.

Over time if work on a service panel is not completed correctly, the circuits could blow more frequently due to overloading. Parts in the panel can become outdated, loosen, or get burned out. If a service panel is not maintained and up to code, it also poses specific risks, making your home more susceptible to fires and electrical surges.

Every electrical installation, whether at home or workplace, is bound to experience common electrical problems every now and then. The majority of these problems have noticeable symptoms and are easily identifiable by non-technical users. Others are complex and require qualified electricians.

All electrical issues should be fixed as soon as possible before they become severe and can cause fires or accidents. While the consumer can see the symptoms, it is advisable to isolate the problem. Accomplish this by either turning off the faulty equipment or circuit and then hiring a qualified electrician. The consumer should never try to repair electrical problems unless qualified to do so.

A lot of time we are asked what is the equivalent LED product to convert from Metal Halide, High Pressure Sodium or Mercury Vapor. And a lot of time, we have a product in mind that works based on past experience. But how did we come up with that product, and how did we make the original decision on what was the proper replacement?

There’s a lot of science that goes into light, color, quality, and each light had it’s own characteristics. For example, it takes less LED to replace High Pressure Sodium than it takes to replace Metal Halide. And we are talking a lot more than just lumens. We are talking about color temperature, quality of light and something called photopic / scotopic lumens.

In the world of lighting, we measure foot candles with a light meter, this is called a photopic measurement. The light meter picks up everything, including spectrum’s that are invisible to us. Now, we humans see things to, and this is called scotopic lumens. Our rods and cones read and interpret light. And it does so differently than what a light meter does. So it is not uncommon when we demo a LED Light against a HPS light or Metal Halide, we first ask “Which is brighter” before we show the light meter reading. It leaves a few people scratching their heads. Well, that’s the science of of it all, and fortunately there is some handy tables called SP ratios that allow us to take the lumens of a particular light (photopic lumens) and multiply it by the S/P ratio to get the scotopic lumens equivalent.

For example, the S/P ratio for High Pressure Sodium is 0.40. The S/P ratio for LED at 5000K is 1.8. So if you take 40,000 lumens of HPS and multiply it 0.4, the effective scotopic lumens is 16,000. To get the same amount of lumens from LED, take the 16,000 and divide it by the S/P ratio and you get 8888 lumens. So the 8888 lumens of LED is the photopic measurement, the 16,000 LED lumens is the scotopic lumens measurement. So in an nutshell, you need 8,888 lumens of LED to replace 40,000 lumens of HPS from a scotopic point of view.

Here is a handy chart of common lights and ratios for you to use.