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Some laws are not acts passed by parliament. They are predictions. Murphy’s Law, for example, says anything likely to go wrong will go wrong. This is a humorous comment on life in general, but other laws are more serious and precise. A few years ago, Haitz’s Law said LED light bulbs would become the most popular source of artificial lighting by 2020.

Dr Roland Haitz first proposed the law at the Strategies in Light conference held in the year 2000. At the time, the lighting industry accounted for 6.5 % of global energy use. So when Dr Haitz said LED light bulbs would make lighting cheaper and more efficient, people sat up and took notice.

Haitz’s Law referred to lumens and watts.

• A lumen is a measure of the light LED light bulbs emit.
• A watt is a unit of power for measuring the energy an electric circuit consumes.

The Law said the cost per lumen of LED lighting would fall to 10% of its original price every 10 years. During the same period, the lumen power of LED light bulbs would increase 20 times.

The drop in price and improvement in brightness meant one thing: a rise in LED efficiency. Haitz’s Law predicted LED lighting would produce 100lm/W (lumens per watt) by 2010, and 200lm/W by 2020. With 200lm/W, Dr Haitz said people would cut their use of electricity for lighting by more than half.

The reality of Haitz’s Law

Since 2000, lighting companies have invested heavily in LED research. As a result, Haitz’s Law is reality. There are LED lighting systems with 100lm/W efficiency. Remarkably, advancements have led to the development of ultra-efficient LED light bulbs that now exceed 200lm/W. These cutting-edge bulbs, available on our site since January 2023, showcase the impressive progress in LED technology. For instance, our Ultra-Efficient LED GLS Light Bulbs represent this leap in performance.

Haitz’s Law was accurate about everything except the time frame. LED light bulbs are developing faster than the Law forecast. They are now common in homes and businesses. Consumers and companies want versatile, long-life, and low-energy lighting. LED light bulbs are the answer.