I bought some Phillips "Daylight" 15 W compact fluorescents for my kitchen and I can't say I'm overly thrilled with them. My existing lights are all 13 W Silvania lights that are well known for their pink tint; they operate at a lower temperature than most fluorescents and have a slightly different emission spectrum. The "Daylight" models are supposed to better mimic the sun. I assumed that they added some phosphors to the glass. I'm not sure that I can tell any difference from them versus a traditional 2900 K fluorescent tube. They Phillips bulbs produce unsightly high contrast shadows -- the dreaded gray wall syndrome.
The other problem is that they emphasize the pink tint of my other lights -- something that I otherwise had an easy time not noticing. On the plus side the Phillips lights are silent. My Sylvania's do emit a hum from their iron transformer.
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