Broad beam 8.5" at 17 inch working distance.
The beam pattern has a bright portion that is about 8.5 inches in diameter at 17 inch distance.  For dental work the beam should have been no more than 2 inches (254 mm).  It does not come with an orange filter for composite work. At 3.375&#34;  its bright beam (not the fringe light) is 3&#34; diameter.  Its variable light adjustment feature is great - dim to full brightness.  I currently don't have a light meter to determine the actual brightness at 17 inches.  (432 mm : where 420mm is the common working distance of most fixed focus surgical loupes ranging from 2x to 6x magnification).  Me things I bought a cool rechargeable camping / emergency light but not one for ready use on a typodont mounted out on my deck.
Rating: 3 stars