Phil believes that DC lighting, SOLAR pack and smart house accessories such as electronic window darkening and no-wire switches are important to TUFF+ marketing. 
Some of these would be the ‘sizzle’ needed in the demo house design. 
Electric darkening 
Kinetic Switch – see DC SOLAR APPROACH
https://tuff.plus/wp-content/uploads/2025/11/TUFF-DC-ELECTRICAL.docx