This site might already be known by the membership, so forgive me if this post is redundant. It permitted me to build an extremely powerful lighting system, which also provides me a 12 v. power supply. He also provides diagrams and in-depth information on building light weight systems. All rechargeable. After going through the information, most anyone could design and construct a lighting system suitable to their needs at great cost savings.
He also discusses commercially available systems.
I hope someone finds it useful.