EVERYDAY SCIENCE

Detailed explanation-1: -Typically, plants use more blue and blue-green light when they are seedlings, and more red light later on in their life cycles when they begin to flower and produce seeds.

Detailed explanation-2: -Blue light regulates plant growth, which makes it ideal for growing foliage plants and short, stocky seedlings (but too much will result in stunted plants). You can tell which color a grow light produces by looking at its Kelvin rating.

Detailed explanation-3: -In contrast, blue light is considered equally effective as green or red light at driving photosynthesis. Thus, while blue light can appear somewhat dim to us, it has high energy and is useful for plant growth applications.

Detailed explanation-4: -Blue light treatment reduced the seed germination rate, but significantly increased seed germination potential, and strongly affected the growth of the stem and flowering.

Detailed explanation-5: -Plants preferentially absorb red and blue light. Much of the light produced by “white” LEDs are in spectra (colors) that plants do not use. This unused light is just converted to heat within the leaves, requiring lower environmental temperatures to maintain optimal leaf surface temperatures.