Buy Luxform Lighting 150W dusk / dawn sensor with built-in photocell On, Off, Auto and 1-9 hour timer. Input: 12Vac bio-pin round male plug. Output: 12Vac 150W with bio-pin round female plug.
12V 60W Transformer + timer - Luxform Lighting
Luxform transformer 12 Volt 11.2 x 10.2 cm 60 Watt black - Internet-Home&Garden