any ideas on a DIY fixture for my 125W bulb, anyone done one before

ive spent too much got and ideas on how to DIY a bulb fixture for my 125W bulb .. ? . any links to tutorials and ideas. anyone done one before ..
its too far big for an ordinary can, so that DIY is out the window ..

I used a £1 shiny metal baking tray and bent to a double parabolic shape I fitted it to a 150w MH works well!