Laser Lines Ltd. is offering a modulated dual-line light engine manufactured by Cobolt AB and optimized for optogenetics research. This version of the Cobolt dual combiner offers two emission wavelengths for light-activated proteins – 473 nm (up to 50 mW) and 594 nm (up to 100 mW) – from one small box. Via an integrated silent shutter, the output beam can be modulated at up to 100 Hz with a rise time of <350 µs, with maintained 3% power stability and noise of <0.3% rms. Each line can be individually addressed through a software application provided with the lasers, or through RS-232/USB interfaces. The combiner is suitable for optogenetics applications where a high level of power stability and control of the delivered energies are required.