Yna-2 LED Instruction manual here. Our Yna-2 LED light is a compact, light-weight and powerful LED. The Yna-2 provides 28,000 lux at 30 cm for 9 hours continuous use. For intermittent use this may be extended. The Yna-2 LED was specifically designed, engineered and manufactured for use by dentists. As an adjunct to the overhead surgery light it will produce adequate illumination at the target whilst not risking the setting of composites. When integrated co-axially with HOGIES loupes, the combination will provide a fully illuminated ‘shadow free’ and magnified small diameter and deep cavity. Hogies Yna-2 lights are supplied with 3AA disposable batteries. The Yna-2 LED is fully compatible with all current Hogies frame systems.