I want to say I had some improvement in using the CHE over red bulbs.. but I've since moved on to an AP with RHP. In doing so I went from having a humidifier piped into a screened tank with much of the screen covered, to not using anything to supplement humidity at all.... with the AP enclosure I had to start mixing my substrate to keep the humidity down. It ran like 98% for days if it was straight cypress... Now I do 50/50 cypress mulch and reptibark. My humidity is staying in the 60's easily, and to bump it I can just put a handful of mulch in or spray/mix in some water.