Lithium battery (lithium-thionyl or LiSOCl2) brand Voltec. The "M" variant has a lower capacity, but it lends itself better to applications with higher currents, compared to the standard ER34615...

Economic bulb Biax™ T/E LongLast™ 4-pin F42TBX/841/A/4P/EOL 46315 - General Electric - with long life and high brightness, used in offices, homes and industrial/commercial spaces, in special lamps...

Metal iodide light bulb for lighting commercial spaces, interiors, arcades, buildings, monuments, museums, exhibition halls, public and pedestrian spaces, parks and gardens with a very long lifespan...