A solar desktop lamp is typically a device consisting of a built in re-chargeable battery and LED lights giving a bright light with a minimum of power. Typically such solar desktop lamps can be powered with an USB 5V connector. Thus one can charge or run the lamp directly with a very small solar panel or one can connect it to a solar fueled power bank or battery.
USD 4 -
A full charge typically lasts 6 - 8h. So if you power it directly with a very small solar cell, there is enough light for the evening and morning hours.
