Enhanced Plant Growth: Monochromatic Red Laser Diodes Surpass LEDs in Photosynthesis Efficiency

A recent study published in Frontiers in Plant Science explores the potential advantages of laser diodes (LDs) over traditional light-emitting diodes (LEDs) for optimizing plant growth in indoor horticulture. Conducted by researchers from the University of Tokyo, Stanley Electric Co., and National Chung Hsing University, the research focused on the effects of red LD light on photosynthesis and growth in tobacco plants. The study evaluated six different light sources and identified LD 660, with an emission peak of 660 nm, as superior to LED 664 in promoting gas exchange efficiency, photochemical activity, and carbohydrate accumulation. Subsequent experimentation demonstrated that plants exposed to LD 660 had enhanced photosynthetic capacity and greater biomass compared to those grown under LED 664. These findings suggest that LD technology offers promising benefits for enhancing indoor plant production efficiency.