There are two types of light bulb;
1. Energy saving, compact flourescent, fluorescent
These are the official bulbs you are supposed to fit everywhere. They will make you look like a witch; the pronounced green / blue cast turns the skin a deathly sick green decaying colour like a day-old zombie and highlights all those tiny lines and wrinkles. They make you look as though you're in the terminal stages of an unpleasant disease. If you apply make-up under this light and then go outdoors into real light, you will look hideous and tasteless. Never choose clothes under this light - they will be a different colour in real light, too.
These are the old type bulbs that the EU has made totally illegal from 1st September. They flatter, smooth wrinkles and blemishes and throw a faintly red/amber cast that's warm and sexy; under this light you look fit, healthy, desirable and to the subconscious male psyche faintly flushed as though sexually stimulated. Make up applied under this light will look sophisticated, restrained and expert in real daylight. This is why professional make-up mirrors have a ring of incandescent bulbs not strip lights.
Neither the green cast from fluorescent or the pinky cast from incandescent is visible - the brain corrects what the eye sees so that both appear 'white', but the subconscious registers the true colour and conditions our responses accordingly.
Here's a scientific explanation that you won't possibly understand. So please go back to playing with kittens, and remember - DON'T let your tradesmen fit the witch-bulbs or you'll never enjoy male attention again
(pulls tin helmet on ...)