LED fixtures, such as

With energy consumption that is less than half of what 150-watt LED parking lot light that is a direct replacement for 400-watt metal-halide (MH) fixtures. That’s 250 watts less for the same amount of light!

The average price of electricity per kilowatt-hour (kWh) is 12 cents. To figure out the monthly cost of running 25 LED parking lot lights for 11 hours per day, use this formula: (combined wattage x monthly hours of use)/1,000 x price per kWh. For 25 LED lights, (3,750 x 330)/1,000 x .12) the total would be $148.50 per month or $1,782 per year.

When the same formula is used for 400-watt MH fixtures, the monthly cost is $396, and yearly cost would be $4,752. So, in this situation, switching to LED fixtures would save approximately $3,000 per year. When coupled with the savings on maintenance, LED fixtures can save $6,470 per year. At that rate, the cost of 25 $340 LED fixtures would be recouped within two years.

Left: LED wall packs; Right: HID wall packs

Unlike LED fixtures that light up instantly, HID parking lot lights require a warmup period of up to 10 minutes before they reach full brightness. They also can’t be turned immediately back on after being switched off; this is called restrike time, and it can take up to 15 minutes before they can be turned on again. Attempting to power on the lights before the bulbs have cooled can damage a fixture’s components and cause the HID bulb to fail sooner.

HID lamps consist of a ballast and a quartz tube that contains gas, metal salts, and two tungsten electrodes. In order to create light, an electric arc passes from one electrode to the other through a gas (most commonly mercury, metal halide, or sodium). The mercury used in this process is dangerous if enough is inhaled or released into the environment. If an HID bulb bursts, all contents should be put into a sealed container or sealed bag and taken to a recycling center or hazardous waste facility. If HID fixtures are used indoors, wall packs and canopy lights, are used indoors, the possibility of ultraviolet (UV) radiation exposure should be taken into consideration. HID bulbs emit a substantial amount of UV radiation, but an outer glass envelope prevents the radiation from escaping. However—according to the FDA—”If the outer bulb breaks and the inner tube continues to operate unshielded, intense UV radiation is emitted. UV exposure at this level can cause eye and skin burns, as well as blurred or double vision, headaches, and nausea.” The UV light from an HID bulb with a broken envelope can also lead to discoloration of items and fabric. LEDs emit little to no UV radiation.

In short, LED lights are a better alternative to HID parking lot lights. They offer a great deal in the way of savings, longevity, maintenance reduction, brightness, color, and safety. While it may take a short amount of time to recoup the price of switching to LEDs, all of their qualities make it easy to see why so many businesses have started the process.

For technical questions, don’t hesitate to call us toll free at 866-590-3533. Our customer service and technical support teams are available from 8:30 a.m. to 8 p.m. CDT Monday-Thursday and 8:30 a.m. to 4 p.m. CDT on Friday.

If the department stores are to be believed, the holiday season started about a month ago—which means if your house isn’t already fully decorated, you’re way behind! This year, make sure your holiday lights are safe by following these tips:

Before you buy or install new lights, make sure you know both how many watts the decorations require and how many watts are available in your home (if you’re not sure, ask an electrician at Kolb Electric!). Remember—the lower the wattage, the less electricity your lights will consume and the less they will cost to operate.

Since holiday lights draw so much power, you probably don’t want to plug them into a circuit that you’re using for other appliances—the circuit is likely to blow. Instead, call a DC electrician to install a dedicated circuit for your decorations.

In addition to installing a dedicated circuit for your holiday lighting, you may also want to install a timer for your lights. A timer will shut off your lights automatically, adding security and making sure everything is off in the middle of the night.

Extension cords are susceptible to water damage, so if you plan to use any outside, make sure they are covered so they can’t get wet. Never connect more than three strings of lights either—if you need more length, use a different plug.

Above all, make sure you take ordinary precautions with your holiday lights. This includes:

At Kolb Electric, we want to wish everyone a happy and safe holiday season. And if you need electrical service in Washington, DC, Maryland, or Virginia, call Kolb Electric today!

Electrical motors are wonderful devices that are used in a myriad of ways, making things easier in our daily lives as well as a wide range of industrial applications. When these gadgets fail, work often grinds to a halt till they’re back up and running, and the reasons for electrical motor failure can range from the commonplace to the bizarre.

While the list of possible causes can go on forever, we’ll take a look at some of the most common ones here:

Exposure to high heat is a top culprit for all kinds of equipment failure, and ranks as the number one reason for motor malfunctions and deterioration. Optimal running temperatures extend motor life, which is why they should be your first priority.

In fact, most of the other possible reasons for electrical motor malfunctions also lead to the generation of extra heat. A rise of even a few degrees can cause trouble over time, and if motor windings are exposed to an extra 10° C of heat, the life of their insulation drops by half!