so we can use 25 to 30 watt LED light to replace 50-watt Compact fluorescent lamp gives 4000 lumens. √ For high-pressure sodium lamps, their luminous efficiency is about 80 to 90lm/w. So can we can use a 15 watts LED light to replace the 50-watt metal halide lamp give 2500 lumens.

√ For metal halide lamps, their luminous efficacy is 50lm/w. Because different types of lamps have different luminous effects, when replacing traditional lighting with LEDs, the lumens of the old and new lamps should match, not the wattage.īelow are the examples to replace different kinds of light fixtures. Wattage refers to the energy consumed by LED lamps, and lumens represent brightness. They mistakenly associate the wattage with the brightness, but the wattage does not represent the brightness of the lamp. When people choose LED lamps to replace existing lamps, they believe that the wattage of the new and old lamps should be the same. For example, when doing lighting design for the football pitch, a stadium, or a port, we can use both LED flood light and LED spot light (We call LED stadium light). In our opinion when an area should be lighted, the LED light with narrow beam angle(spotlight) or wide beam angle(floodlight) can be used together so this area can be lighted with good uniformity. When larger areas, such as driveways, stages, warehouses, parking lots, tunnels or any other areas should be illuminated, you can use LED floodlight with a wide beam angle which is with wide and even light coverage. When specific points such as display objects, wall art, architectural details, or landscape features should be lighted, you can choose outdoor led flood lights with a small beam angle.Ģ. When its output power and lumens are the same as the spotlight, it can illuminate a larger space.Īpplication of LED spot light and LED flood lights:ġ. √ While LED flood light can spread a light whose beam angle can reach 120 degrees. This kind of beam angle is more concentrated and easier to control and point. √ LED spot light projects a narrow beam of light, normally no more than 45 degrees.

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