In this picture, and the picture on the previous post of my grand son, the white balance was set to Incandescent that is 'bulb' setting, I shot photos in artificial light during night inside, but, just trying the shoot outdoors next day, the blue cast was very much destroying the natural look of daylight photographs. It was also difficult to correct the blue cast in photoshop, though I tried to remove the same, but unable to achieve the result I cud get in Auto mode or set the WB to clear sun. Therefore, always look at the WB settings when shooting in various light situations, as indoors, under clear sun, Elect.Flash, overcast sky and/or in shade...However I too manage outdoors by setting WB on Auto, but definitely change while taking photographs inside in bulb or fluorescent lighting. A look at the chart below will be able to understand the temperature measurement, how in low temperatures the pic will get yellowish to red effect and in high temperatures the very much evident blue cast. However, it will also help to get some 'special effects' sometimes when u try them by shooting in different lightings with different WB settings on your camera.
Temperature Table
Candle Flame...............1500K
Incandescent..........3000K
Fluorescent........................3700K
Sunlight average/elect.flash...5500K
Overcast sky/clouds....6000-7000K
Shade................8000 K
Technically they are the average measurements, help u understand the warm (low) and cool (high) temperatures, but necessary in Digital cameras to set them as you click in variable lights. For novices Auto will help a lot outdoors and with built in or external flash.
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