The absorbed energy is converted to heat energy. The scenario you mention with the LED is very close to the blackbody problem known as the ultraviolet catastrophe.. There is a Wikipedia article about it here. What happens in the situation you described is that the light proof box gets hotter.
Diagnosing rust on geraniums can be a challenge for growers. Rust begins with yellow spots on the underside of the leaves and can rapidly progress with brown fungal spores called pustules in the center of each spot. The pustules are raised up off the leaf surface and feel rough to the touch.
Geranium oil is an effective anti-inflammatory. It also helps to lighten age spots and even out overall skin tone. Geranium oil also improves circulation under the skinâs surface which aids in cell regeneration, making it useful for fading scars, wrinkles, and other visible imperfections in the skin.