Excerpt by GreenTek Energy Systems:
GreenTek has now started to manufacture a special lens in popular demand, the Stripe Lens. This lens is a hybrid of a frosted and clear lens. This special lens provides the brightness of a clear lens, but the dispersion of a frosted lens providing optimal lighting. This lens gives an effect of multiple rows of LEDs instead of single row. As of now, GreenTek has only manufactured these on the 4ft Linear Tubes - 6000K - Clear (Bypass Tube), however, this option can be made on any tube type, length, or fitting.
Special lens compared to a frosted and clear lens: