Solar day lamps (SDL) are simple and cost-effective. A few examples of SDLs have been described in [1], [2] and [3]. An SDL without any energy storage element suffers from frequent changes in the ...

When the Sun is shining and illumination is needed inside a dimly lit interior space, a popular, proven, and highly efficient solution is to utilize the energy of available sunlight in the simplest ...

Christmas lamp posts are one of those classic decor pieces that have stood the test of time. Their warm glow reminds us of classic, cozy Christmases full of snow, evergreens, and caroling. Once used ...