Troffers are the choice lighting solution for large interior spaces like offices and basements. Because of their popularity, consumers now have many fixture options from which to choose. To select the right troffer for your project, there are two major options you should consider up front to help narrow your selection: optics and light source.
Choose the right optics for your application:
Good
Lensed Troffers have an acrylic lens or diffuser used to diffuse and evenly distribute light while concealing the glare of bulbs at the ceiling. This is the most common type of troffer in the consumer marketplace, and it is a good all-purpose, economical choice. Lensed troffers are perfect for residential or commercial applications.
Better
Parabolic Troffers use a series of metal or plastic louvers to form a perpendicular grid below the bulbs. The squares of the grid are called “cells”, and they focus light downward. This type of optic control reduces the visual impact of the fixture at the ceiling and reduces glare on surfaces like computer screens. Office spaces are ideal applications for parabolic troffers.
Best
Volumetric Troffers combine diffusers and reflectors to evenly fill the entire volume of space with light. Their optics are designed to optimize both vertical (downward) light and horizontal (light closer to the ceiling) light. In addition to providing quality light distribution, they also tend to have a higher-end, architectural look making them ideal for commercial applications like retail spaces.
Choose the right light source:
Choosing the right light source is important, because it affects operating cost (energy-consumption) and maintenance cost. If an existing space is lit with older troffers, they might use T12 fluorescent bulbs which are no longer the most efficient choice. You should consider relighting or renovating to save money by using one of the following light sources:
Good
T8 Fluorescent Technology is up to 20% more efficient than T12 (depending on your lamp/ballast combination), so it has become the most popular light source in the consumer marketplace for troffers. T8 bulbs also typically offer a higher CRI (color rendering index) rating for improved light quality.
Better
T5 Fluorescent Technology is up to 15% more efficient than T8 (depending on your lamp/ballast combination) and also offers improved CRI. Starting temperatures can range down to -20 degrees Fahrenheit allowing for use in colder environments.
Best
LED is the newest light source available for troffers. You will pay more up front for this light source, but LED troffers are up to 25% more efficient than T8 and most are fully dimmable. And, because the LEDs are integrated with the fixture and last an average of 50,000 hours, you never have to worry about changing bulbs. Click here to find out more about Lithonia Lighting’s TLED Troffer.>