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Lumens is best described as the measurement of light.
Led light output vs current. At low power levels the difference is even larger. Many different models and styles of led bulbs are available in today s marketplace. What about cfl bulbs. Sync your lights pumps and so much more.
When choosing a bulb keep in mind the following. The temperature dependence is much less for ingan leds e g blue green white than for algainp leds e g red and yellow. And with a shift to more energy efficient light. The light output of an led for a constant current varies as a function of its junction temperature.
In short led and cfl as technologies do not have a difference in brightness intrinsically. Here is wattage in its proper place. For example a 3w led is equivalent in output to a 45 w incandescent. Another advantage of leds is the hassle factor leds last a lot longer than a regular bulb.
By driving led light sources with a regulated constant current power supply the light output variation and lifetime issues resulting from voltage variation and voltage changes can be eliminated. Bright led flood lamps use only 11 to 12 watts while creating a light output comparable to a 50 watt incandescent bulb. Therefore constant current drivers are generally recommended for powering led light sources. For example a 2012 7w bulb with a cree xt e chip can produce more light or lumen output than a 12w bulb with an older cree xp e chip.
Pay close attention to lumens since this number indicates the brightness or light output of the bulb. Brightness is determined by lumens. Orbit marine ic dual pro led smart control. A single cfl and led bulb might have the same lumen brightness output but vary greatly in the amount energy needed to generate that level of brightness.
Figure 9 shows the light output of several leds as a function of junction temperature. To save the most energy choose the bulb with the lowest wattage suitable for its usage. Simply take your current incandescent watts and select the corresponding led bulb equivalent on the lumens brightness scale. Read the package to choose desired illumination level.
Warmer light in the 2700k range is way you d expect from a standard incandescent the k stands for kelvin.
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