5851 Crabtree Batten Lamp Holder T2: The Crabtree 5851 batten lamp holder is engineered for T2 fluorescent and LED retrofit tubes, featuring a high-impact, UL94-V0 rated thermoplastic body with integrated grip slots to secure lamp ends and prevent accidental dislodgement; it incorporates captive steel-spring contacts for reliable electrical connection over 50,000 on/off cycles, accepts 0.5–2.5 mm² conductors via screw terminals, and mounts to standard back-box centers with snap-fit clips; its compact 28 mm depth profile and white UV-stable finish ensure unobtrusive installation in commercial, industrial, or residential ceilings, while full UKCA/CE certification and an IP20 rating guarantee compliance with 18th Edition wiring regulations and safe operation in dry interior environments.