constant-current LED driver or constant-current driver is used to regulate the amount of current that is supplied to an LED or LED array to maximize LED lifetime. If current is not regulated, LED brightness can fluctuate and life span can be shortened. The constant-current driver is used for LEDs or light fixtures that require a stable output current and operate within a range of voltages. Most finished LED products already have a constant-current driver or resistors to regulate current. If you’re building an LED fixture or replacing a constant-current driver, it’s important to verify that the output current and voltage of the driver is compatible with the LEDs’ current and voltage. If your LED product already has a constant-current driver or uses resistors in the LED array, you might need a constant-voltage power supply.

If your LEDs are dimmable and you want to change their brightness, choose a Magnitude Dimmable Power Supplies. These dimmable power supplies work by varying the power on the AC input side of the power supply by means of a TRIAC dimmer. This change in power on the AC input side will vary the voltage on the DC output side and control the intensity of the LEDs. TRIAC dimmers are common hardware store and household dimmers, which include brand names such as Lutron and Leviton.

Pulse-Width Modulation Dimming: Pulse-width modulation (PWM) dimming can be used to control dimmable power supplies such as Mean Well LPF Series. This type of dimming control adjusts the output current based on the duty cycle. As the duty cycle increases, current will increase and the LEDs will be brighter. Conversely, if the duty cycle decreases, the current will decrease and the LEDs will be dimmer. Pulse-width modulation for these drivers is based on a 10-volt signal level with a frequency between 100Hz-3KHz. The MLD-5A are compatible for this application.

Resistive Dimming: Resistive dimming can be used to control dimmable power supplies such as 12-Volt Mean Well HLG-40-240 Series or 12-Volt Mean Well HLG-600 Series or here.

The efficiency of a power supply or driver indicates the percentage of power that goes toward making your LED product function. An efficiency of 80 percent or higher is recommended for operating LEDs. 

When choosing a driver or power supply, the size of an LED product’s housing or area of installation is important. If you wish to put a constant-current LED driver inside of a product, the driver must be small enough to fit in the product’s housing. Similarly, if the driver or power supply is used outside of the product’s housing, it should fit the area of installation. Drivers and power supplies are available in a variety of sizes to suit your needs.

A Class 2 driver or power supply is in accordance with limited power levels defined by the National Electric Code (NEC) and fulfills the requirements of Standard UL 1310. Output is limited to 60 volts DC and 100 watts. Because power sources with this rating have limited output, it might not be possible to power as many LEDs or lights as those that don’t have a Class 2 rating. However, these power supplies and drivers provide protection from fire and electric shock.

A Class II rating refers to a double insulation layer between AC input and DC output wires. These drivers and power supplies do not require a ground connection.

Indoor Generator Provides 20,000 Watts of Stored Renewable Energy to a Ranch Home, Even When All External Power Supply is Unavailable

Dallas, TX  December 30, 2011– Doug Kerr is the proud owner of a stretch of land located in the rural area of Kaufman County (Texas) where the air is fresh and the hustle and bustle of city life is non-existent. One thing Doug’s land doesn’t have, however, is a city power grid. Traditionally, to gain access to power in an area that hasn’t already been included on the electrical grid, you can pay the local electrical provider a large sum to run new electrical service to your location, or be forced to use noisy, polluting, and high-maintenance fuel-powered generators.

Without proper lighting, the details in your furniture and artwork at first sight go unnoticed. Careful lighting design gives dimension and texture, revealing the articulacy of your home décor. Creating the proper lighting setup lies in finding the correct spacing, fixtures and functions for each room. Every lighting technique brings you closer to customization and works together to establish a healthy balance between posh and practicality.

Consider adding toe kick lighting under the counters of your kitchen or bathroom to balance light between the ceiling and floor. It’s subtle yet useful, and provides an extra cushion of safety. Toe kick lighting arrangements also bring depth to unlikely spaces.

Don’t neglect the nooks and crannies of your home; light them up. Take advantage of layering through the use of key, task and accent lighting. Key lighting will provide basic light function overhead. If used alone, it will provide flat, uninteresting light.

Reading lamps are the perfect approach to task lighting and can be placed on your bedside table or next to your favorite lounge chair. And, accent lighting gives the finishing touch. It highlights details that slip under the radar if left in the dark. Add accent lights to illuminate intricate artwork, plants, cabinet silhouettes and wall textures.