The present invention relates to a pointless illumination device, comprising: a body; a cover, made of a light spreading material which can uniformly spread out the light of a plurality of light emitting devices; a light source module; a first contact portion; and a second contact portion. A radiation-sensitive resin composition including a fluorine-containing polymer having a structural unit that includes a group represented by the following formula, and a radiation-sensitive acid generator. In addition, since attachment strip, instead of the lath directly, is secured to the sheathing, fewer mounting devices are needed compared to when a lath is directly secured to a sheathing, where substantially more mounting devices would be needed. The second semiconductor chip has a second thickness that is thinner than the first thickness. Also described is a method for preparing or treating such compositions and the resulting compositions. A detector sensing the presence of an environmental condition, which requires the sounding of an alert is operable to transmit a signal to other remotely linked detectors, thereby triggering the remotely linked detectors to sound an appropriate alarm.