I had some beautiful pieces personally and realized that they always look dirty in sunlight.

Inside mount is better - unless you need complete blackout (ie in an area like AK where there's nearly 24 hours of sunlight in summer).

Hunting leases are a popular way to generate steady income, especially in rural areas.Solar or Wind Leasing: If your land is in an area with good sunlight or wind, companies might be interested in leasing it to install solar panels or wind turbines.

Although not as sensitive as hardwood to temperature, humidity and sunlight, these things still effect LVP.

Exploration of solar panels with 1,651 hours of usable sunlight per year and attractive state and federal grants available.Water Drainage:Check the grading around the property to ensure proper water runoff.

Built in 1890, this Old Victorian was converted into a duplex in the 70's by a talented architect who made some unique and extraordinary custom design choices (read Vaulted Sunlights) that make this property truly one of a kind.

They only want the sunlight from others, but then they end up in the dark because they didn't listen.

No formula can be accurate across the board because even “cookie cutter” properties next store to each other differ as to view, location to the street, topography of the land, lot size, physical condition of the property, past remodeling, quality of the mechanical systems, sunlight, utility bills, past use, etc.  

I'd also remind them of things to do to keep it cooler in the unit (open windows in the evening-if it is safe to do so, and early morning to let in cooler air and let how air out) and keep curtains or blinds closed to avoid sunlight coming into the unit (ie when sun is shining on that part of the building).

We only got sunlight piped here twenty years ago. - Not taking into consideration the foundation issues.