Embodiments of the invention provide systems and techniques for analyzing an existing light fixture in its installed environment and, based on the sensed location of the light and its environmental illumination pattern, identifying at least one LED retrofit fixture that may be used to replace the existing light fixture. Alternatively, the first and second hinges can be formed of elastomeric materials. According to such a configuration, a portable radiation dosimeter that is compact and can manage the radiation exposure dose for a long term without placing a burden on the wearer can be realized. The only difference in the magnetic head fabrication process is the modification of the photolithographic mask that is used to create the electroplating trench in which the electrical lead is electroplated, and the change to the mask involves the creation of a second opening within the mask for the creation of an electroplating trench at the location of the heat sink.