I bought 2 23w 6500k "daylight" 1600 lumens cfls, then 5 days later added 2 more, but bought 2 30w (more wattage) "bright whites", only 2700k, but it is advertised at 2100 lumens (better). Should I keep using the 30w 2700k clfs, (along with the already 2 others) or get 2 more 23w 6500k 1600...