You might want to start thinking in terms of lumens and color temperature. So 800 lumens at 2700K. Philips make ones at higher lumens and lower (warmer) color temperatures. I have one for my one and only floor lamp and it fills up the room and still enough for reading.

Granted, I tend to prefer darker rooms anyways and I'm quite happy to have candle light in the evenings (about 100 - 200 lumens).