Energy-saving LED light source features 36 surface mount diodes to provide 7.6W bright illumination Large 7.2 inch wide, 5 diaper glass lens magnifies 225% Removable light diffusers can be detached for brighter lighting when doing close or detailed work Adjustable architect-style metal arms measure 36 inches in length Heavy-duty metal mounting clamp includes locking pin feature to prevent unintended lifting and is adjustable from .25 inches up to 2.5 inches wide to fit virtually any clamping surface Colour Black Batteries required? No

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