Well Currently there is nothing higher than 32 bit.
You can find high flatbed scanners but the bits higher than 32 are to compensate for cheep manufacturing or defects in the capturing array.
Colour temp is more important then Watts. I will assume you are using a 10000K bulb. This bulb to the average camera will look very blue, as all film and CCDs are balanced to 6500K or Daylight (the colour temperature of the noon day sun). The first thing everyone must be made aware is that all digital camera run the raw image through software. Each manufacture has there own proprietary software that is integral to the operation of the camera. Each camera interprets the voltages produced by light hitting the CCD in a different way. I would say at this time there are only minor differences in software despite the fact that many manufactures looked at the problem in many different ways. You may find the dark areas in a Kodak camera have detail were the same images taken with a Canon looses detail faster the darker the image area gets.
That being said the camera software is always looking for white in order to create an image that has correct colour. This is done through software. Under 10000K bulbs the camera knows that the entire image is very blue and needs to make something white. This is were White balance is so important. With out it the camera will find a highlight area and just make it white. Often the result is yellow pictures. Yellow being the complimentary colour to blue in a Light colour wheel.
I believe this is your issue. The Camera is over compensating for the blue in your tank. I'm not familiar with the D520's operations so after dinner I will do a web search to find info on white balance for that camera and get back to you.
If you post a pic I will have a better idea of the colour problem.
Thanks
J
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