Typical solar panels are 200-300 watts. The light you linked to is 5W, and depending on where you are, and how much sun you get on average - it should be very doable. But, it may or may not be "worth" doing.
It depends on the cost - if you can find a small (say 20-100 watt panel), for under $50, and a workable battery system for about the same - then would that be worth it to you?
A 5 watt bulb is a very small load. With a motion detector built into the bulb, it may only operate a few minutes a day - or maybe it won't run at all?
The expensive parts are the solar panel, the battery, it's charger, and the inverter - and the labor to install it all.
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