29.5 centimeters

【Super Bright & Power Saving】Our work lights use high quality chips, which can produce up to 5000LM brightness. High quality reflective film and beam angle up to 120° provides brighter light. Equivalent to 400W halogen bulb, and helps saving over 85% on electricity bill.
【Excellent Heat Dissipation & Durability】 Multiple Groove shape design on the back side increases air contact area and speeds up heat dissipation, extending the service lifespan. Featured with sturdy tempered glass, it is safe, durable, solid with extremely high light transmittance.
【IP66 Waterproof】With IP66 level, it can be widely used in outdoor and indoor lighting projects; Easy to use with 5m cord, on/off switch, portable handle and firm standing bracket.