No lamp change required. The LED lighting used has a service life of approx. 50. 000 hours Up to 10x longer battery life than using a conventional bulb Bright, homogeneous illumination thanks to SMD LED and collimation optics Extremely light and unbreakable plastic lenses (PXM). In combination with the cera-tec hard coating, they have a glass-like scratch resistance. Box contents: magnifying glass, 3 clip-on colour filters for the most suitable colour temperature and light intensity, case for attaching to the lens, 2 x AA demo batteries. Optional: stand / holder mobase from Eschenbach Optik for ambidextrous reading and working.