LED Lighting

We just replaced our entire hallway lighting with LEDs, in total, that’s 8 halogen bulbs gone. I have to say, I’m fairly impressed for a first generation technology, it’s not perfect, but it does work well.

The good, the bad and the ugly

The new bulbs aren’t as bright as the old halogens, having said that, we bought some of the cheapest LED lights there are, little 1W babies, it’s possible to get ones that are much brighter.

The new bulbs also give off a slightly cooler light than the old, but not as cold as I expected, they’re entirely acceptable in the hallway.

Some maths

The new bulbs cost €5 each, and have a life time of 50,000 hours, as I said, they’re 1W bulbs, so they’re gonna use about 50kWh in their life.

The old bulbs also cost about €5 each, and have a lifetime of 750 hours, they were 25W bulbs. Over the life time of the LED lights, I would have to replace them 67 times, and the would use 1,250kWh.

Electricity costs about €0.15 per kWh at the moment, and I can only imagine that will go up. Lets make a conservative estimate that over the next 50 years, the average price will be €0.20 per kWh.

That puts the price of an LED light over the next 50 years at €15 – €5 for the bulb, and €10 for the electricity. The halogen bulbs meanwhile cost €585 – €335 for the bulbs and €250 for electricity.

I knew that LEDs cost less over time, but honestly, I had no idea it was that much that you saved.