Led Light Output Vs Current

Brightness is determined by lumens.

Led light output vs current.

Pay close attention to lumens since this number indicates the brightness or light output of the bulb. Here is wattage in its proper place. 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. Lumens is best described as the measurement of light.

Figure 9 shows the light output of several leds as a function of junction temperature. 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. 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. When choosing a bulb keep in mind the following.

In short led and cfl as technologies do not have a difference in brightness intrinsically. Older led chips found in older generation led bulbs from as recent as 2008 2010 produce less light per watt than the 2011 2012 led chips found in more modern led bulbs. The temperature dependence is much less for ingan leds e g blue green white than for algainp leds e g red and yellow. Many different models and styles of led bulbs are available in today s marketplace.

Simply take your current incandescent watts and select the corresponding led bulb equivalent on the lumens brightness scale. What about cfl bulbs. Read the package to choose desired illumination level. The light output of an led for a constant current varies as a function of its junction temperature.

Sync your lights pumps and so much more. Another advantage of leds is the hassle factor leds last a lot longer than a regular bulb. For example a 3w led is equivalent in output to a 45 w incandescent. Orbit marine ic dual pro led smart control.

Warmer light in the 2700k range is way you d expect from a standard incandescent the k stands for kelvin. Also known as color temperature this indicates the quality of light ranging from warm yellow light to cool blue light. At low power levels the difference is even larger. 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.