26-02-2020, 01:48 PM
In the end of the era of GLS lamps, the lamp cost was tiny compared to the electricity for anything over 25W. Our USA friends had an advantage because of lower voltage. Thicker filaments allowed them to get more light output for a given power and life. Eg a 100W, 1000h lamp was 1330lm here, 1600lm there.
Now a 1520lm LED uses about 13W, lasts 25000h and costs about £7. That's about £1.80 per 1000 hours. Still dominated by the electricity cost. A GLS 100W lamps would be about £12.50 per 1000 hours, almost all in electricity.
Now a 1520lm LED uses about 13W, lasts 25000h and costs about £7. That's about £1.80 per 1000 hours. Still dominated by the electricity cost. A GLS 100W lamps would be about £12.50 per 1000 hours, almost all in electricity.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
