My HDW2431T is 1/3" and I think it has pretty good low-light ability.
I see HDW3449TM-AS-LED has 1/2.7" sensor - so maybe a little better, and price can be as low as $100 USD to $150?
Is there any 3449 that has SD-card for in-camera recording?
What is least expensive 1/1.8" Dahua turrent camera with SD card?
(I'm in Canada, but typically buy off ebay but I could buy from Empire)
3449H-TM-AS-PRO (TIOC-PRO) with 1/1.8" sensor... called Color4M in Andy shop...
EmpireTech IPC-Color4M-T 1/1.8" CMOS 4MP Smart Dual Light Active Deter
4-MP 1/1.8" CMOS | Built-in multi-core light | Max. IR distance is 30 m | Max. warm light distance is 30 m | Intelligent monitoring: Intrusion, tripwire | Supports max. 512 G Micro SD card | Built-in dual Mic | Support two-way talk | IP67 protection | Sound and light alarm (red and blue lights)...
empiretech01.com