Fusion-K Melanopic+ is a luminaire for climate ceilings that uses melanopic lighting technology to create a natural and comfortable lighting environment that boosts employee wellbeing, concentration and productivity. The LED spectrum is enhanced with cyan light during the day which stimulates the retinal ganglion cells (ipRGCs) that are responsible for the non-visual effects of light, melanopic illuminance can help improve alertness, enhance visual comfort, mood, cognitive performance, stimulates creativity and reduces stress. The Melanopic Daylight Efficacy Ratio (Melanopic-DER) is a measure of the biological impact of an artificial light source compared to natural daylight with a color temperature of 6500K. A reference daylight spectrum has a Melanopic-DER of 1. The higher the Melanopic-DER value, the greater the impact of the lighting on the body’s circadian rhythm. Fusion-K Melanopic+ is available with a CCT of 3000K (MDER=0.59, M/P Ratio=0.65) or 4000K (MDER=0.67, M/P Ratio=0.74).