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/cm.sup.2, and a relation between the diameter Dc of the recessed part (102) and an interval .DELTA.h between the top of the recessed part (102) and the top part of the light emitting tube (101) meets the requirement of .DELTA.h.ltoreq.1.15.times.Dc+1.25 [mm].

 
Web www.patentalert.com

< Toy bowling pin with sounding and lighting effect

< Production method of porous spherical particles of vinyl polymer

> Energy efficient lighting apparatus and use thereof

> Device and method for adjusting view range of vehicular monitoring device
~ 00271