The lighting was in  three stages:

• 2 x marine T8 fluorescent,
• 2 x 150w 10,000 Kelvin metal halide,
• 1 x actinic T8 fluorescent.  

The timers control the lighting to simulate a typical day time sequence. This sequence is loaded towards the evening to enable better viewing when I am at home.

Tank Hood Layout

Daytime Lighting Sequence