I added an automatic misting system to my nepenthes shelf today. Currently I'm tired of running humidifiers, plus the lights seem to keep some type of barrier from the humidity. I've always noticed huge increases in humidity after misting, so I decided to build a little system to do it for me twice a day. The lights seem to dry off the leaves in a few hours, so I'm not worried that the neps will be too wet.
Built with an automatic irrigation controller, electronic solenoid water valve, 1/2" pvc pipe, and 4 spots for misting nozzles. One spot for a nozzle is currently removed and plugged, as some bratty dews sit on that side of the shelf.
The tricky and expensive part is finding all the adapters needed to go through all the odd sizes of the system. The system had to go from 1/4" tubing, to the valve 3/4", to 1/4" tubing again, to 1/2" PVC, to the final 1/8" misting nozzle.
But the tests have worked out pretty good so far, I'll see how it goes tomorrow.
Click for bigger pics.