“This Botswana Standard covers incandescent tungsten filament lamps of the following categories for use in motor vehicles and trailers: R2, H1, H2, H3, H4, P21W, P21/5W, R5W, R10W, C5W, C18W, C21W, T4W, W3W, and W5W.
This Botswana Standard also covers other categories of lamp that are covered in SANS 20037.”