1 - What bulb would meet those requirements?
I was quite surprised when we set up our beauty parade before we chose the kitchen lights (this was 6 months ago though)
Some of them were sickly green/lurid blue, but the 2700 K Auroras were
way too warm. We went for 4000 K in the end, which wasn't what i expected, but for a kitchen with warm wooden units & floor they're ace. You might want a warmer one for a loo
I can recommend Aurora though; we have 20 in our kitchen
2 - Have we established a cheap and reputable stockist?
They're on Amazon, £12.99.