I figured it couldn't do any harm, so I tried it out.
I am a believer!
My N.ventricosa which refused to pitcher has produced a pitcher
about 10.5 centimeters (about 4.25 inches) in height and
4 centimeters at the mouth and another is on the way. It could
be that it just got used to the Phototron, but the other plants
are growing faster as well.
Chris