Using light emitting diodes (LEDs) for greenhouse illumination enables the use of automatic control. since both light quality and quantity can be tuned. Potential candidate signals when using biological feedback for light optimisation are steady-state chlorophyll a fluorescence gains at 740 nm. defined as the difference in steady-state fluorescence at 740 nm divided by the difference ... https://www.spidertattooz.com/Jacques-Marie-Mage-Baudelaire-2-Montra/