These are the best options when you need a simple, all in one solution. Typically used for outdoor installation (although they can be used indoors as well), bullet cameras have built in Infra red for low light conditions and some models include a varifocal lens to enable zooming in to the area of interest.
1080P HDCVI IR-Bullet Camera with vari-focal lens (895-29-HFW2220RPVF)

1080P HDCVI IR-Bullet Camera with vari-focal lens (895-29-HFW2220RPVF)

Dahua website logo
This 1080P water-proof HDCVI IR-Bullet Camera with Smart IR, has a 30m IR distance is IP66 rated, and operates in environments from -30'c to 60'c. 

1080P HDCVI IR-Bullet Camera with metal housing (895-29-HFW2220SP36B)

1080P HDCVI IR-Bullet Camera with metal housing (895-29-HFW2220SP36B)

Dahua website logo
This 1080P water-proof HDCVI IR-Bullet Camera has a 30m IR distance is IP66 rated, operates in environments from -30'c to 60'c. 

720P HDCVI IR-Bullet Camera with vari-focal lens (895-29-HFW1100RPVF)

720P HDCVI IR-Bullet Camera with vari-focal lens (895-29-HFW1100RPVF)

Dahua website logo
This 720P water-proof HDCVI IR-Bullet Camera with smart IR, has a 30m IR distance is IP66 rated, operates in environments from -30'c to 60'c.

720P HDCVI IR-Bullet Camera with metal housing (895-29-HFW1100RMP36B)

720P HDCVI IR-Bullet Camera with metal housing (895-29-HFW1100RMP36B)

Dahua website logo
This 720P water-proof HDCVI IR-Bullet Camera with smart IR, has a 20m IR distance is IP66 rated with 3-axis adjustable.

720P HDCVI IR-Bullet Camera with plastic housing (895-29-HFW1100RP36B)

720P HDCVI IR-Bullet Camera with plastic housing (895-29-HFW1100RP36B)

Dahua website logo
This 720P water-proof HDCVI IR-Bullet Camera with smart IR, has a 20m IR distance is IP66 rated with 3-axis adjustable.