Here the U.S.A. the daylight type bulbs cost lot more than the cool or
warm tubes. No matter what tubes you use, though, go with a combination
of different type. This way you will still get a decent spectra even
after the tubes have aged some. Try two daylight bulbs or two sho 'n
gro (gives off a pink/purple light) along with two cool whites. This
way the plants will get enough light but you won't go as broke giving
it to them. I wouldn't use warm whites on Heliamphora since they'd
like more blue and I don't think they are that good for plants anyway.
Comments?
Dave Evans