What is the characteristic of reflective glass with a pyrolytic deposition?

Reflective glass with a pyrolytic deposition is indeed characterized by its ability to be either tempered or heat-strengthened. This type of glass features a coating that is bonded to the glass surface during manufacturing through a high-temperature process, which gives it its reflective properties and enhances its strength and durability. The ability to undergo tempering or heat strengthening allows the glass to meet various safety standards and performance requirements, making it versatile for use in a variety of architectural applications.

The other options do not accurately represent the characteristics of reflective glass with pyrolytic deposition. It is not limited to skylights, can be clear and not necessarily opaque, and while it may require specific cleaning methods due to the coatings, it is not a definitive characteristic that applies universally. The primary defining characteristic is indeed its suitability for tempering or heat strengthening.