'sun hours' is not a correct and usable part of a sentence in written English.
You could use phrases such as 'hours of sun', 'hours of sunlight', or 'hours of daylight'. For example, "We spent hours in the garden, enjoying the warm summer sun."
Environmental conditions included latitude, altitude, ambient temperature, degree days and sun hours; building characteristics consisted in building area and volume.
Weather variables included temperature, wind speed, total amount of sun hours, precipitation, barometric pressure, and relative humidity.
Ithaca gets 2.3 sun hours per day in the winter according to http://www.solar4power.com/solar-power-insolation-window.html.html
Avoid outdoor activities during peak sun hours of 10 a.m. to 4 p.m. Wear protective clothing, sunglasses and wide-brimmed hats.
It's also important to wear reasonable gear that covers the shoulders and upper back, and to avoid training in peak sun hours".
"The first line of defense should be to avoid U.V. exposure during peak sun hours, seek shade, and, when you do go out, make sure you wear protective clothing and a hat," Dr. Saraiya said.
What this means is that a solar cell rated at 1W will produce 1Wh of electricity per sun hour.
The man had taken Mary Celeste away from Lazarus when he'd been dead asleep, and he'd had her for a full sun hour before Lazarus tracked and ambushed him, tackling him to the ground.
An advantage of CSP is its ability to store thermal energy for use during off-sun hours which is typically done by storing sensible heat in molten salts.
The off-sun hours, cloudy and rainy seasons are main drawbacks for commercial realization.
Although your label suggests it, I won't launder you by hand but I will change into undies when my girlfriends and I spend eight after-sun hours drinking wine and analyzing which Kardashian sister is affected most by the recent events.
