4K Bullet: DS-2CD4A85F-IZH - We have used this model and have been very happy with the low light ability. I think this would be our default outdoor camera if every budget allowed.
4MP Bullet: DS-2CD2T42WD-I5 - This may be the one you already have? This is a good default camera for outdoor scenes where it can be mounted out of the reach of vandals. Has 120db True WDR as well.
2MP Darkfighter Bullet: DS-2CD4A26FWD-IZH8 - This model has a longer lens option and I am curious about the low light disadvantage (if any) if the lens is zoomed to the full 32mm setting. The 8~32mm lens is rated at f/1.4, the same value for the 2.8~12mm lens. That seems unlikely to me.
4MP Turret: DS-2CD2342WD-I - Bonus testing of the turret model to see if its EXIR performs as well as the bullet model. The bullet is rated at 50m and the turret 30m, but more importantly, which performs better in near field, more than overall range.
NOTICE: This comment was moved from an existing discussion: Axis Lowest Cost Outdoor IR Camera M2025-LE Tested