Portable lighting works best when the whole setup follows the task: where the light sits, how it is supported, where power comes from and how the assembly will be retrieved. In a classified area, each of those choices must remain within the equipment's documented use.
Map the work positions
Separate access lighting from close inspection and repair. A multi-head string serves several positions; a movable hand lamp reaches behind equipment; a supported source stays beside a hands-free repair. Avoid using one high-output beam as a substitute for the different working views.
Trace power from supply to lamp
Record supply input, transformer output where applicable, lamp voltage, cord length and both connector ends. The location of transformers and connections matters as much as the lamp head. Check complete-assembly documentation before selecting optional lengths or plug arrangements.
Check installation and handling
Use approved mounting arrangements and supports, protect cables from sharp edges and moving equipment, and keep access openings usable. A low-voltage lamp still needs the required hazardous-location approval; an IP rating addresses another part of the selection.
Plan inspection and return
Examine cords, lenses, seals, labels and supports before issue and after the job. Use approved replacement components and the manufacturer's servicing procedure. Confirm current delivery and configuration availability for the actual order rather than relying on an old article's lead time.
Hand lamps, string lights and supported portable lights serve different parts of the arrangement.
References: OSHA 1910.307 — Hazardous (classified) locations · OSHA 1926.405 — Temporary wiring and portable lighting · U.S. Department of Energy — LED basics