Aputure AL-160 160 Bulbs 3200K to 5600K LED Video Light / Camera Lighting / Camcorder Lamp for Canon Nikon Sony Pentax Camera / HDSLR Special LED bulb layout design - narrow angle bulbs scatter around, and wide angle bulbs concentrate in middle. Battery power indicator. Press the button, 4 RED LED "ON" means battery full, 1 RED LED "ON" means battery low. Rotate switch can be used to adjust the brightness very smoothly. 16:9 ratio widescreen design for the best lighting effect. With 4 extended slots on the 4 sides, you can combine the lights together to achieve more strong light effects. There are two filters included with this item, one white filter to soften the light (diffuse effect); the other orange filter to reduce the color temperature.