Compact self-ballasted electrodeless discharge lamp and electrodeless-discharge-lamp lighting device

摘要

A bulb type electrodeless discharge lamp, comprising a recessed part (102), wherein the maximum diameter of a light emitting tube (101) is 60 to 90 mm and the tube wall load of the light emitting tube (101) is 0.07 to 0.11 W/cm², and a relation between the diameter Dc of the recessed part (102) and an interval Δh between the top of the recessed part (102) and the top part of the light emitting tube (101) meets the requirement of Δh≦1.15×Dc+1.25 [mm].