/sci/ - Science & Math

Well /sci/ I've just read a paper that had some fairly convincing arguments for a cooling effect of moonlight.

Claim: Two equal glasses of water are left outside at night for a few hours during or near a full moon, they both measure the same temperature. Then one glass gets a shade set up blocking the moonlight. They are both left a couple more hours. The temperature reading is done again surprisingly the one in the shade measures warmer than the glass of water left in the moonlight for some hours.

Can /sci/ prove or debunk this phenomena?
If proven, can /sci/ explain this strange behavior of moonlight.