What is a cheaper and longer lasting alternative between a AA, a AAA, and a solar panel(1.5v)?
Question:
Answer:
The best solution would be a combination of AA accumulator and solar cell. You can actually get AA size accumulator, that can be recharged during daytime by the solar cell and make the bulb light at night time. This can work for at least 2-2 and a half years. Normal AA accumulators (I for one use VARTA) are guaranteed for around 1000 charging-discharging cycles. One cycle roughly corresponds to one day and one night.
That would be somewhere around 8000-10.000 hours. As usually low voltage glow bulbs are guaranteed for around 2000-3000 hours you will probably have to change the bulb maybe 3 times before changing the battery!
Normal alkaline AA batteries will last around 1 week while AAA (smaller power) will only last a couple of days.
You are missing these bits of information:
The capacities of the AA and AAA in mAh. Manufacturers rarely give this information away to the end consumers.
The operating current of the 'gow' bulb.
The ratings of the solar panel.
The solar availability at your site.
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