Very nice lantern
![Smile :)](./images/smilies/icon_e_smile.gif)
It's impossible to operate 250W, and 400W lamps correctly in one fixture without replacing ballast, I think, that your is designed for 250W mercury lamps, because it is SKZR-250, not SKZR-400
Of course 400W lamp, and bigger will also work, but it wouldn't light with full power and brightness
Could you show us more, and bigger photos of this lantern ?
If it's possible please show us night photos
![Smile :)](./images/smilies/icon_e_smile.gif)