In dual-phase time-projection chambers there are photosensor arrays arranged to allow for inference of the positions of interactions within the detector. If there is a gap in data left by a broken or saturated photosensors. the inference of the position is less precise and less accurate. As we are unable to repair or replace photosensors once the experiment has begun. https://www.roamingfreesims.com/product-category/emergency-site-lighting/