the intersecting groove 33 the pullout member 35 can be prevented from being too easily pulled out by a user or unintentionally pulled out for example being caught on something with the result that the case 31 can be prevented from being split at times other than the time of recycling furthermore since the pullout member 35 has a hole a recycling manufacturer can pull out the pullout member 35 by using the hole which further facilitates the disassembling of the lamp 30 furthermore since the lamp 30 includes the cover member 36 formed by metal powder coating the pullout member 35 is concealed this allows the case 31 to be prevented from being split by a user pulling the pullout member 35 a lamp 40 according to this embodiment includes a split member and a pullout member as in the case of the lamp 30 according to embodiment 3 however the groove and the pullout member of the lamp 40 are different from the groove and the pullout member of the lamp 30 accordingly the following describes the lamp 40 according to this embodiment mainly differences from the lamp 30 according to embodiment 3 fig1 is a front elevational view of the lamp according to embodiment 4 of the present invention fig1 is an expanded cross sectional view.