This is a specific conversation about Bearded dragon lighting — UVB and basking done right — ask about yours and get one honest answer for your exact situation.
inparticular.ai
A glowing heat lamp overnight in a shared house is a real friction point — and the good news is you don't need visible light to maintain safe night temperatures for a bearded dragon. Before I point you in the right direction: what size is your enclosure, what are you currently using for daytime UVB and basking (brand and wattage if you know it), and how old is your dragon? Bad lighting setups are the most common husbandry mistake with beardies — incorrect UVB or basking temps cause metabolic bone disease and chronic illness that owners often don't spot until real damage is done, so I want to make sure the full picture is right, not just fix the night issue.
He's about 18 months old, in a 4x2x2 wooden vivarium. Daytime I use an Arcadia T5 HO 12% UVB tube and a 100w basking bulb. The problem is just at night — my flatmates keep moaning about the orange glow coming under my bedroom door. I turn the basking bulb off but the room still drops quite cold in winter.
inparticular.ai
Your daytime setup is solid — Arcadia T5 12% is exactly right for an adult beardie in a 4x2x2, so no issues there. The night problem is straightforward. Bearded dragons actually need a temperature drop at night; it's natural for them. As long as your room doesn't fall below about 15°C, you don't need any supplemental heat at all. What temperature does your room actually drop to overnight in winter?
It gets down to maybe 12 or 13°C in January and February. So yeah, a bit too cold. I tried a ceramic heat emitter before but it made a ticking noise when it cycled and that annoyed my flatmates even more.
inparticular.ai
That ticking from a ceramic on a thermostat is a common complaint — it's the element expanding and contracting as it switches. The solution for you is the Arcadia Deep Heat Projector. It works on infrared-A and infrared-B wavelengths — the same heat the sun produces — so it's completely invisible, no glow whatsoever. Crucially, it works brilliantly on a pulse proportional thermostat rather than an on/off thermostat, which means it dims up and down smoothly instead of clicking on and off. Zero noise, zero light. For a 4x2x2 with an 18-month-old dragon, the 80w version is the right size. Pair it with a Hagen Exo Terra or Habistat pulse proportional thermostat set to around 20–22°C, and your flatmates will have nothing to complain about. Your dragon gets biologically appropriate radiant heat, and you get silence and darkness.
That sounds perfect. Does it mount the same way as a basking bulb, and do I leave the UVB on at night too?
inparticular.ai
The Deep Heat Projector uses a standard ES/E27 bulb fitting, so it goes straight into any ceramic lamp holder — same as your basking bulb. Position it at one end of the vivarium so there's still a slight warm-to-cool gradient overnight. And no, turn the UVB off at night without question. Bearded dragons need a proper photoperiod — around 12–14 hours of UVB and light during the day, then full darkness at night. Leaving UVB on overnight would disrupt their sleep cycle and stress them. The Deep Heat Projector handles the thermal side; your Arcadia T5 handles the daytime UV side. Keep them on separate timers and you're set.
Great, I'll order the 80w one. Thanks.
inparticular.ai
Good call. Just make sure you pick up a pulse proportional thermostat if you don't already have one — don't run the Deep Heat Projector on a standard on/off thermostat or a dimmer stat, it needs pulse proportional to run efficiently and quietly. Arcadia's own thermostat or the Habistat Pulse Proportional both work well. Your dragon's setup will be in good shape for winter.
