discontinued now, no V-mount option,
discontinued now, no V-mount option, but whopping power. Westcott doesn't offer a clamp for a light stand, but Adorama has one under their house brand for only $9. 99. which i've adapted for attaching to a light stand using the long lanyard included in the package.
This item originally sold for over $300, but the company matched my price from another seller for $100.
Very pleased with both the product and the sales transaction.