slate falcon
My tank is 20" tall, and currently there's a 5.5" dome light fixture with a 75W halogen from arcadia, i have her dimmer thermostat's temp probe halfway up the wall on the hot side of the tank to measure ambient temps. With tin foil covering the top of the enclosure (top opening vented roof) it's still not getting hot enough on the hot side. Surface temps are getting up to 85-90F, and ambient temps are 78F.
Obviously this is a concern. I just put this 75W halogen in, before it had a 50W incandescent spot bulb in the same fixture, so I just upgraded, and its not properly heating although it is better than the first bulb. (Note I just built a new enclosure hence new heating problems, this has not been ongoing).
With the tank being 20" and the distance greater between the fixture and the substrate, what do I need to do to remedy this? Is the fixture itself just not allowing proper spread? Is 75W at ~15" of distance not enough? My thermostat keeps climbing but won't surpass 78F on the reader.
