Multi Purpose Downlight SLSD153
This high quality recessed downlight is designed to take the following types of bulb:

The cut out diameter is 153mm and the overall rim diameter is 170mm. The light is 200mm high and needs a minimum cavity height of 240mm.
For full technical data follow this link
http://www.superlux.co.nz/products.asp?id=343&product=246
Contact us at sales@nzlightingltd.co.nz or 0800NZLIGHT for more information