How to Find the Right LED Bulb

LED lamps have finally begun its victory march. They consume very little power and are extremely durable. The slightly higher selling price compared to halogen and energy-saving lamps pays for itself quickly. According to an investigation by Stiftung Warentest are LEDs to steady by far the best bulbs .Even with problems of acceptance by the consumer, the LED technology has a lot less mess than the unloved energy-saving lamps. The result of understanding to lumens and light color packaging details, find easily LEDs that donate as warm, bright and pleasant light, like the still missing from many old bulb. A simple rule of thumb will help you choose.

Find the Right LED Bulb

First, the anger was huge, as the old incandescent bulbs flew gradually from the market. The energy-saving lamps, which should replace the old bulbs, found no acceptance. Too cold was the light, too little homely. In addition, the unpopular fluorescent lamps contain dangerous mercury. The bulbs are hazardous waste. If an energy saving lamp accidentally breaks, even a health hazard. No wonder that many consumers felt patronized by the forced transition to CFLs.

LED Lamps Are Environmentally Friendly And Durable

however, LED lamps come with no harmful mercury, but consume as little electricity and last longer. They are also more resistant to frequent switching on and off. “Halogen lamps typically have a duty cycle of 8000, energy lamps of up to 30,000 and LED lamps of around 50,000,” explained lighting manufacturer on its website. Many previous tests have shown that energy-saving lamps in practice usually even tolerate much less switching cycles.

For its long-term cost comparison in February you looked at Stiftung Warentest a period of twelve years and estimated for this period four halogen, two fluorescent and only one LED lamp. In the end, the total cost of acquisition and consumption of halogen lamps totaled 200 euros and for energy-saving lamps to 87 euros. The LED section with only 59 Euro total cost from the best and was also in the ecological balance forward.


How bright LEDs, is indicated on the packaging in the unit lumen (lm). An old 40-watt incandescent lamp, for example, lights up with a brightness of about 390 lm. As a rough rule of thumb, you can expect the wattage of the bulb earlier times ten and then know about the lumen value of the same bright LED. The graph shows more precisely how much correspond lumens of brightness old light bulbs:

Beam angle

Unlike the previous incandescent light from LEDs is bundled. Classically, they shine as a spot light and not scatter light uniformly. For ceiling lights that will illuminate an entire room evenly as possible, this is not ideal. How smoothly the lamps spread its light, it is the so-called half-angle information. This is the angle of the beam, where the intensity of the lamp is still at least half of its maximum-to a 400-lumen LED for meadow still lit to at least 200 lumens.

For spot lighting or to illuminate an LED an object, an image or the like, using LEDs with a beam angle of 35 degrees. To illuminate a room-for example, in the ceiling light-come LEDs with a beam angle of 120 degrees for use.


A big plus of LEDs is their versatility. The lamps are available in a variety. For almost all light sockets there are now LED lamps. Equally diverse are the types of LEDs. The lamps can also be formed as the previous incandescent bulbs. There they are, but for example also in the form of candles, so that they can also be used in chandeliers, wall torches or other lights, in which the lamp is visible.

Light Color

“The color temperature or light color is given in Kelvin (K) and describes whether the white light is more yellowish or bluish hot-cool,” said Lower Saxony’s lamp manufacturers Paulmann. “Warm white light similar to daylight late, it is very cozy and relaxing. Neutral white light has an activating effect, daylight white promotes concentration.” As the chart shows, color temperatures to 3300 K are referred to as warm white, color temperatures of 3300 K to 5300 K as daylight white as neutral white and 5300K:

Color Rendering Index

The Association of German Engineers (VDI) also advises to pay attention to when buying LED on the so-called “color rendering index” (CRI). The CRI value, sometimes indicated as a color rendering index Ra, describes how well one can identify and distinguish colors in the light of a lamp.

A street lighting have, for example, a very low value, because in their orange light, it is difficult to distinguish colors. Fluorescent and energy saving lamps in the standard design also have a poor CRI according to the VDI.Your light THAT CONDITION greenish yellow and let the skin look pale. Dark blue and black are also often difficult to distinguish in its light.

The quality of color reproduction is specified with a number from 1 to 100 bar. With normal requirements on the light value is greater than 80 in the household sufficient so the VDI. Unfortunately, not all manufacturers provide the CRI value on its packaging.