To examine the cost comparison, let’s take a look at a standard 60-watt replacement incandescent bulb in this example. When shopping for your next light bulb, simply find the lumen output you’re looking for (the bigger the brighter) and choose the bulb with the lowest wattage (the lower the better).
Labels on the front of light bulb packages now state a bulb’s brightness in lumens, instead of the bulb’s energy usage in watts. Lumens, not watts, tell you how bright a light bulb is, no matter the type of bulb. To compare different light bulbs, you need to know about lumens. The lower the wattage needed, the better.
#Light bulb brightness scale how to
How to understand this table – look at the lumens (brightness) in the far left column, then compare how many watts of power each light bulb type requires to produce that level of brightness. LED bulbs require much less wattage than CFL or Incandescent light bulbs, which is why LEDs are more energy-efficient and longer lasting than their competitors. The chart below illustrates the amount of brightness in lumens you can expect from different wattages of light bulbs. Fast forward to new LED generations, and we see the little light-emitting diodes surpassing CFLs in overall energy consumption, color and even becoming more competitively priced in the marketplace. In most recessed lighting (ceiling), however, the LED would have greater efficacy. For example, in a floor lamp, a CFL would perform better because of the light coverage was, at the time, much broader. Many LED bulbs in the past were not omnidirectional which gave the upper hand to CFL in various scenarios. 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. Lumens is best described as the measurement of light. In short, LED and CFL as technologies do not have a difference in brightness intrinsically. You can use this table as a guide to understand how bright an LED light will be compared with a conventional light.Are LED lights brighter than or equal to Compact Fluorescent (CFL) bulbs? The trick is to understand the technology. The Effective Lumens value will always be lower than the Raw Lumens value (sometimes by a huge amount) so care should be taken when comparing LED lights that you are looking at like-for-like outputs.Īll of our LED lights have their outputs stated in Effective Lumens (where manufacturer's data is available) and the higher the value, the brighter the light will be. However, once these chips are assembled into the lamp complete with the lens and housing there will be losses that reduce the actual light output, so a better measurement is Effective Lumens which takes into account these losses and tells you about the useful visible light that is produced. Raw Lumens is a measure of the theoretical maximum brightness of the LED chips themselves, based on the chip output and drive current. LED lights instead have their outputs stated in Lumens which is a direct measurement of brightness rather than power consumption. The problem with LEDs is that they use much, much less power than conventional bulbs for an equivalent light output, so using Watts as a measure of comparing brightness is no longer useful. This allows us to have a good understanding of how bright it will be as there is an approximate correlation between power consumed by the bulb (Watts) and brightness. Conventional lighting based upon incandescent filament bulbs is traditionally referred to as having an output in Watts.
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