Thanks for educating me - I was unaware of that and have changed my opinion.
For anyone else thinking like I was, this is the evidence from the UK government site [1]:
Research has shown that DRLs are likely to reduce multiple vehicle daytime accidents and fatalities by up to 6% once all vehicles are equipped. DRL are likely to result in a small increase in fuel consumption and CO² emissions of around 0.5% but this is expected to be lower when LEDs are used in place of filament light sources.
[1] https://www.gov.uk/government/publications/daytime-running-l...
Doesn't apply to wireless phone charging though, so I'm standing by that comment until someone disabuses me of that too..
If you think running some LEDs are expensive, you don't want to know what a serious accident costs society. The type that totals two cars and puts multiple people in hospital.
I have a car that pre-dates DRLs, and I always drive it with the lights on. The "horrendously" inefficient incandescent bulbs might cost me an extra dollar or two in fuel, but could save my life. I'd rather have my life.