Specifically LED bulbs. They're fantastic, a miracle of modern technology. Efficient, non-toxic, cheap, a myriad of choices, but it's killing me. The number of times I've bought bulbs and they've been the wrong colour temperature or brightness. Most recently I've been fitting dimmers and that's a minefield in itself, the majority of those buzz incessantly and the best of them inject an annoying delay to the lights turning on. But how come the 3000k 1400 lumen bulb in my hallway seems ten times as white as the three 2700k 806 lumen bulbs I've just fitted to the living room? The 4000k units they're replacing seem no different to the 3000k. I'd exchange them but Philips have decided to only supply the 4000k units in ES, and they already project above the light fitting so adapters are out of the question. Perhaps I can get the soldering iron out and make my own? Urgh, has anyone else suffered from this or am I just fussy?