PAR (Photosynthetically Active Radiation) describes the portion of the visible spectrum that plants “see” and use for photosynthesis (400nm-700nm). PPFD (Photosynthetic Photon Flux Density) measures the amount of light (PAR) a plant receives over time. PPFD represents the light density a plant receives over time and is measured in micromoles [of photons] per square meter per second (1).A way to visualize PPFD is to imagine the sun is “pouring” light onto the plant leaves. As the sun pours light onto...

The whole point of choosing a garage lighting system is to illuminate the space. This is the most important factor. Traditionally, the brightness of a bulb was measured by how many watts it consumed. The higher the wattage meant more brightness. Nowadays, lumens and lux are used. So, what exactly are lumens and lux?In simple terms, Lumens (denoted by lm) are a measure of the total amount of visible light (to the human eye) from a lamp or light source....