The Pros and Cons of Low Energy LED Lighting

For most people, probably the biggest single factor against low energy LED lighting as a substitute for the soon-to-be-phased-out regular incandescent light bulb is the cost differential. There is no doubt that an LED equivalent light bulb (for example a 6w LED spotlight as a direct replacement for a 35w GU10 halogen lamp) is significantly more expensive than either the original or a CFL alternative.

There are however three important points to bear in mind about the higher price for low energy LEDs as compared to incandescent and energy saving CFL light bulbs.

First, the price difference reflects the fact that the use of LED for general purpose domestic lighting is still quite novel, though increasing manufacturing levels and consumer take-up will drive the price down dramatically once both come fully on stream over the coming months.

Second, and partially related to the observation above, is that the cost of LEDs drops by a factor of twenty over the course of each decade. This characteristic is reliably predicted by Haitz’s Law (very similar to Moore’s Law for computer chips and for similar reasons, principally because LEDs are, just like computer chips, pure electronic devices). Haitz also states that LED performance (amount of light per watt of electricity) increases tenfold over the same decade.

Third and perhaps most intriguing is the fact that as far as the cost of domestic lighting is concerned, the price of light bulbs is almost entirely irrelevant. It is an extraordinary yet easily provable fact that even if regular light bulbs were totally free and LED lights cost, let’s say something outrageous like $80 each, it would still be vastly more economical to purchase LED low energy lights.