A modular temporary lighting assembly and multi-outlet stringer particularly suited for building construction settings. A bulk semiconductor layer is provided with a thickness BSLT>TCD. The oxygen detector monitors oxygen partial pressure of vapors in an ullage volume of a tank. The transimpedance amplifier circuit provides differential output signals that are based on amplifying the differential input signals. In one exemplary embodiment, the first probability is computed according to the following equation:Probability=(triesnode+1probabilityParent-trieschild. Optional signal indicators may provide a notice signal when the tilt angle exceeds the programmed threshold angle or some predetermined fraction thereof.