A collection of ten individual digital illustrations, each rendered in a clean, hand-drawn, watercolor-like style on a transparent checkered background. The images depict various themes related to technology, energy, and the environment. This includes a traditional glowing light bulb with a visible filament, a modern LED light bulb with a blue body and cooling fins, a tall vertical hydrogen storage tank labeled "H?", a circular smart thermostat showing a temperature of "20" and a leaf symbol, a sweeping landscape of green agricultural fields, the rear of a blue electric car being charged, a modern white LED light bulb, a top-down view of a hydrogen energy storage system with nine green spherical tanks, a large horizontal hydrogen storage tank with a pressure gauge and valves, and a modern square smart thermostat with a green leaf 'eco mode' display. All illustrations feature lively watercolor splashes in shades of green, blue, and yellow as a vibrant backdrop, making them ideal for promoting smart home technology, energy efficiency, green energy campaigns, or as decorative elements for blogs and websites related to home automation, sustainable living, and technology.
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