What are bullish and bearish candle sticks

Bullish and Bearish reversal candles come in many formations. Below is a list of the major single candles.
This link provides a comprehensive list 
  Candle stick patterns

> Doji
> Bullish & Bearish engulfing signals
> Hammer
> Hanging man
> Piercing pattern
> Dark cloud
> Bullish harami
> Bearish harami
> Morning and Evening stars
> Kicker signals
> Shooting star
> Inverted hammer

Single candle sticks are usually weak in the smaller time frames so we look for candle stick combinations. This section cannot cover all the possible scenarios hence we have provide a reference page link here that provides the major combinations. Add this page to your bookmark –   Candle stick patterns)

Some examples:

Morning Star

The Morning Star Pattern is viewed as a bullish reversal pattern, usually occurring at the bottom of a downtrend. The pattern consists of three candlesticks.
The morning star is a bullish, bottom reversal pattern that is the opposite of the 
Evening Star.

Shooting Star

A shooting star is interpreted as a type of reversal pattern presaging a falling price. The Shooting Star looks exactly the same as the Inverted hammer, but instead of being found in a downtrend it is found in an uptrend and thus has different implications.