A powerful halogen lamp shines cool light directly on the subject, resulting in a bright, 3D image. Welch Allyn LumiView Its clip-on battery pack provides more than enough power for a long day’s worth of examinations.The Welch Allyn LumiView Portable Binocular Microscope is a breakthrough product with its unique converging stereoscopic viewing system. Specially configured optics literally converge the user’s binocular vision, providing a magnified, three-dimensional view that can be focused into narrow cavities.