How well does a Moteino hold up under heat?

[WhiteHare]

Uh, yeah. I remember I was eyeing a variant of this one, exactly because its cover around the solar cells is made of aluminium alloy where the sun hits it the most.

I came across a picture of what one might look like inside:

http://www.amazon.com/Zitrades-Lighting-Waterproof-Landscape-Courtyard/dp/B011E1V7PU/ref=pd_sim_sbs_86_3?ie=UTF8&dpID=51IDQAyLQoL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1103F8FY2HBF83G9E5EE
That particular one is 3x the price, but it seems to have also gotten more favorable reviews.

Sealing against moisture is probably key to any worthwhile longevity.  My wife purchased some cheap $1 garden path lights, and they barely lasted a couple of months before corrosion from moisture intrusion caused them all to fail one by one.