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.
Step 1. Plant flowers that deer do not like. Planting these flowers around and among your geraniums will hide the geraniums so that deer do not find them. Flowers that deer are not fond of include wild indigo, daffodils, dahlia and rosemary.eer are mammals that love to feast on grass, shrubs, leaves from trees, and flowers. One type of flower that deer will eat if they find it is a geranium.