It had been hard as of end 2011 to get hold of anything more than about 7W (ie ~40W incandescent equivalent) for standard 240V domestic bayonet or ES fittings. I jumped at the chance to try the LEDON (Energy Saving Trust approved) 10W bayonet mains lamp though expensive at just under £30 including VAT. This has a 600lm output, and as advertised is 'very yellow' and to my eye more so than other 2700K-colour-rated 'warm white' lamps, and claims "exceptionally good colour rendering (90Ra)." A warmer and more orange tint to it than the slightly watery Clas Ohlson 7W.

The first place we've been testing it is in our small bathroom, which long ago was lit by a 60W or 100W incandescent as I recall, but we had a 7W LED (~470lm) bulb there for a while which we grew used to. My daughter and and partner both commented on the new lamp being noticeably brighter, which should make it easier to spot dirt on us and the surfaces! Reading in the bath was slightly hard work with the 7W lamp; the new one is a definite improvement there.

2018-03-14: smashed out of the ceiling and destroyed (along with the ceiling fitting) by my children today, while one was in the bath underneath. Ah well...