Hunza GU10 fittings are not supplied with bulbs/lamps. If you wish to use LED, only ones approved by Hunza should be used as other brands may not fit and lead to water ingress which will invalidate the product warranty.
Possibly our best selling steplight, the Hunza Step Light Solid Eyelid flange has a smooth machined finish without mounting holes.
Moonlight Design recommends that all lighting should be installed by a registered NICEIC electrician