As regular readers of Eco Tech Daily will know, I’ve been fascinated by the rapid transformation of lightbulbs in recent years. (Please see my article 2015: The Year of the LED).

Not so long ago, consumers had only three options when choosing a lightbulb.

The traditional incandescent lightbulb. Which offered warm light, but suffered from short lifetimes and expensive running costs.

The halogen lightbulb. This improved on the technology used by incandescents, and offered smaller bulbs with high-intensity light. Halogen lightbulbs also had better energy-efficiency (i.e., were cheaper to run) than incandescents.