Welcome! You are currently viewing our board as a guest which allows you to view most discussions and gain limited access to other features. By joining you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access other features. Registration is fast and simple so please, join our community today ! The point sources are a potential problem so I have had to modify the lamp house I use to take a low voltage halogen type microscope bulb; and it turns out that the low voltage bulb can be driven by a voltage controlled DC supply which provides consistent illumination....