I just want to know. Almost all my lamps are rare as they are Indian, but here are some of the rarest.
Samson
F10T12 BL (very rare size, along with being BL)
Mysore palace branded
15w incandescent (this lamp is manufactured and used only in one place, and cannot be bought generally)
Surya F40T12 in
red,
green and
blue (very obscure information, not even their official website's fluorescent page has it mentioned)
Madhab neon lamps,
swastik and
shree (rare to find good quality neon lamps)
Goldy specially shaped incandescents,
rocket and
spiral (no machines to produce this shape)
Suralux
F14T8 5000k (supposed to be a F15 in 6500k, but got manufacturing defect. 14w tubes are not a standard ever used in India)