Budget food/living

If I would still eat meat, I'd say that sounds nice!

That's 'fairly low' (equivalent of about five bright energy saving bulbs) consumption for, what was it, ten hours?

I don't know, I have a gas stove / oven, and even with risen gas prices I pay about six Euros a month total (and I cook every day and use the oven a lot).

Not eager to argue here, just don't understand the logic of it.

What's being quoted is the highest setting. Most slow cookers have at least a low and a high setting, with the low setting genuinely being light-bulb level. More modern/expensive ones have more settings in between.