(Day 15) Hard Light:
Hard light is quite direct and can often be intense in brightness. This type of lighting creates strong shadows and high contrast. Hard light can be stylistically applied to most any photographic genre, but for many eyes it can be less appealing than other types of lighting.
(Day 16) Soft Light:
Soft light is diffuse providing lighting that is even. This type of lighting reduces contrast and minimizes shadows. Soft light is excellent for portraiture, macro, and nature photography. In the case above the snow and clouds act as a large diffuser.
(Day 17) Backlighting:
ack lighting is when light is behind your subject and is directed at you and your camera. This type of lighting creates silhouettes quiet easily. Combined with certain atmospheric conditions such as fog or airborne dust you can get dramatic lighting effects.
(Day 18) Night:
Taking photos at night is a whole different ball game. The sun may be down but you still have street lights, the moon, headlights and various other sources of light to work with and be creative.
(Day 19) Flash:
Flash is often used used in situations where lighting is too dim to compose an image without introducing alot of grain or "noise". The biggist problem with using flash is that it can create harsh shadows or make a picture seem flat and it will look fake. to combat this issue you should use flash as a "fill" just to give your subject a little pop. Having a DSLR will make this really simple as you can reduce the power of the flash.
(Day 20) Shadows:
Just like hard light find or create those situations and photograph the shadow that is being casted. Photographing a shadow can give you endless possibilities wether you create ambiance or go the abstract route creating shapes or lead the viewer in and around the photo.
(Day 21) Ambiant Light:
Ambient light is non-direct soft lighting that often is bounced from one surface to another. As a result of the non-direct lighting, brightness of your subject is lower than with other types of lighting.