Blue, with a splash of orange
Two flashes - (See lighting diagram) one on camera right in an umbrella, just slightly behind the glass to try and avoid too many reflections. Background is a white wall, with a blue gel'ed strobe hitting it at about 1/8th power. Zoomed and moved the background flash to line up with the composition and to give the fall-off you can see towards the edges of the frame in the blue. Picked blue to play off the complimentary colour relationships with the orange. Put a gobo between the camera and the flash to control any flare (black card attached to the tripod with a plamp), as the umbrella was basically pointing back into the lens.
Reflector low and camera left to bounce some fill (you can see the effect on the lesser highlight on the left of the orange) Biggest challenge was to stop the main light washing out the background - just took some tweaking of the umbrella placement. Flashes triggered with pocket wizards, camera on tripod, triggered with a remote cable, so I could drop the fruit and trigger the camera at the same time.
Took about 10 shots, went and reviewed them on the computer then shot another 10 to get the final result. Was interesting to note the effect on the water by dropping the orange into different shaped vessels - this one is so straight up and down and the water ends up that way too. Also the water level has a effect too - if the vase is really full or not. Had a large plate under the vase to catch/ recycle some of the water.
Garage dried out a couple of days later.
1/250s (strobe sync speed) at f7.1 ISO 400