$10 since it's a prototype. If you go to Home Depot and buy the 500 watt halogen pendants for $10, the glass will slide perfectly into this pendant. That will provide your uv shield. If you order Aquaria Canada's 150 watt diy kit, I can mount your sockets in for free with rivets and it will provide a nice clean look for you.
More pics in the diy section.
Thanks
Des