The Luminos is a simple solution for teachers who need the ability to write and erase throughout their presentations in small sized classes and training rooms with dim lighting, Open head container with highest quality single or triplet lens (not closed head as incorrectly printed in 2006 catalog) swivels 360 degrees so light does not have to shine in presenter"s eyes, Adjustable display angle up to 60 degrees helps avoid ""keystoning"", Focus knob on folding arm for easy storage, Rest stop for overhead lamp while shipping or during storage, High/Low switch for brightness vs lamp life, Lamp changer for uninterrupted use if lamp burns out during presentation, Rugged ABS plastic withstands knocks of daily classroom use, Break resistant glass means less classroom interruptions and repairs, Relpacement Bulb for OHP-2000, SKU: CAFI303