Planned Obsolescence is your fault

[Zaphod]

(01-01-2019 12:45 AM)DA74254 Wrote:  Well, if you live in a cold country, that math doesn't add up. If I have a 60w light bulb lit, then I spend 60w less on my heating. And.. I get light as a bonus

You forget the (% of 60W) wattage of the actual light output ........

So depending on the actual light technology , technically you’d be spending ~>55W less on heating