Lighting Guides

TCP 2ft LED Vapor Tight SW2 18-32W
Wet Location, Damp Location and IP Ratings Explained
What UL wet and damp location listings actually cover, how IP ratings differ from them, which rating each type of space needs, and the ratings that matter for washdown, cold... Read more...
TCP 1x4 LED Center Basket 15-32W
Panels, Troffers and Center Baskets: What Goes Where
Flat panel, center basket and volumetric troffer compared on glare, ceiling type and cost, plus 2x2 versus 2x4 versus 1x4 sizing, back lit versus edge lit construction, and the grid... Read more...
TCP LED Slim Wall Pack SW5 30-60W
How to Choose an LED Wall Pack
Full cutoff versus semi cutoff versus traditional, how to size the wattage from mounting height and coverage, photocell and sensor options, dark sky ordinances, and the corrosion question that decides... Read more...
EDIPAI G1 2x2 LED flat panel with sensor base
Foot Candle Requirements by Space Type
Recommended light levels for warehouse, office, retail, school, healthcare, parking and exterior spaces, what uniformity ratio means, and why an average foot candle number on its own will not keep... Read more...
TCP LED Elite UFO High Bay SW3 81-160W
Replacing Metal Halide with LED: Wattage Equivalents That Actually Work
How to replace metal halide with LED by lumens instead of watts: initial and mean lumens from lamp data sheets for 175W to 1000W lamps, a worked lumen check, LED... Read more...
TCP 4ft T8 LED Tube, Type AB 15W (1,900 lm)
LED Tube Types Explained: Type A, Type B and Hybrid
Type A, Type B, Type C and hybrid LED tubes, what each one does to the fixture, the shunted socket trap that catches people on single ended ballast bypass, and... Read more...
TCP 2ft Linear LED High Bay SW3 81-160W
How Many LED High Bays Do You Need for a Warehouse?
A working method for sizing a warehouse high bay layout: foot candle targets by task, the lumen method with a worked 20,000 square foot example, spacing to mounting height ratios,... Read more...