Solatube International Inc. has released the SkyVault Series M74 DS designed for high-bay commercial daylighting applications. The device features an amplifier that re-orients daylight downward to increase optical efficiency, ease glare and reduce light loss at ceiling level while providing greater light visibility at task level. Additional features include a 29-inch diameter opening to the sky, temperature control with insulated and sealed curb-mounted roof assemblies, and higher daytime illuminating capability that allows for more spacing between the units.