Just found out about these.
http://assets.sylvania.com/assets/Documents/LTFY003.ae352f82-596a-4495-aed6-6dc0dd63559f.pdf
Are they any good for a planted tank?
http://assets.sylvania.com/assets/Documents/LTFY003.ae352f82-596a-4495-aed6-6dc0dd63559f.pdf
Are they any good for a planted tank?