Hi all,
I've got 4 of these fan heat lights and my first one was purchased when they first came out nearly 12 months ago. Using them on Beardies & Central Netted Dragons. I've got the 20W & 50W ones depending on size of enclosure. My dragons love them and sit under them all day long. I think they might even enjoy the small brezze the fan produces??!!! lol
The fan heat lights have a low voltage transformer whcih converts the 240V from your power point to 12V to drive the fan's motor and lights. That is why they are not recommended to use with a dimming thermostat as that can short out the transformer when the dimmer slowly reduces tthe current to the transformer. A straight on/off thermostat might be a better option although that might shorten the life of the bulb, not sure if it would? In saying that, i don't use a thermostat with them at all as I have done lots of test with them and measured the temps. They just don't get that hot that it overheats my enclosure. The trick is to use the right wattage in the right size enclosure and the right distance away from the top of the basking spot. You just need to experiment with it a bit. But that's me and I am certainly not recommending that anyone else does the same. It's only on those mega hot days that I turn them off altogether. If my ambient temp is already going to be 40C inside my house, then my enclsoures sure won't need any more heat.
Even though the light does (according to Reptile One) put out 4-5% UVB, if you're using them on dragons, best not rely on that as a primary source of UVB. It is recommended that for dragons, you use 10.0 for desert/arid species anyway so at 4-5%, that tells me that it's not enough anyways, so I have another 10.0 UVB tube which I use in all my enclosures. Maybe that is why they put it under the heating section, not lighting on the Reptile One website as 'andie' pointed out earlier.
888lowndes888 - some of my fan heat lights started to get noisy too after a few months, but only during start up, then they got quiet again. The first time I replaced a bulb, I found a lot of red dust (from my red desert sand substrate) inside the fan heat light (guess that's normal though as the fan will stir up fine particles of sand and dust I suppose), so I got one of those blower things for cleaning camera lens and a paint brush and gave the inside of the unit a good blow and clean with the paint brush to get all teh dust out. That helped heaps to quieten down the unit and now, whenever my units start to get noisy, I give it a good clean inside. (Oh, you gota pull the bulb off to do it because that's where the fan is.) Hope this tips helps you guys later on too.
Lastly, I found most of this out from the product info sheet which I downloaded from teh reptile one website where the fan heat light is, on one of their products page. There is a link there that you can click on to download a PDF info sheet. There's quite a bit of good info on it including UVB outputs which I found quite useful. Go check it out.
Hope I've helped. E.