temperature control AGAIN, sorry

[bcbob]

Earlier I asked some questions about temp control and got great answers. Thanks.

Through testing of the varying ambient room temps and internal cage temps in my intended herp room, I've decided that I need a rheostat that is automated, not manual as is a dimmer. I want to use flexwatt for obvious reasons. But when I started searching for these products, it has been suggested by some sellers that on/off types of rheostats, as opposed to dimmers and proportional, are NOT recommended for use with flexwatt. I assume this is because of potential electrical fault. I don't know. I'm an ignoramus with this lol!

Any insight out there? There is a HUGE difference in price. I'm willing to pay it but want to know what others think first.

Thanks again in advance,

Bob