it would be better to double or triple the lumens it will work with any number of lumens just the more lumens you have the higher chance it will be better. and yes you want to change to the 2700 or do a mix of both for a more full spectrum
texas grass Reviewed by texas grass on . fluorescent lights I have 2 cfls (5000k) rated at about 8000 lumens. When it comes time to flower the plants should I replace those with 2 8000 lumen cfls(2700k). or should I use all 4 cfls? Rating: 5