Camera attachable lighting is a light powered by small LEDs which give a lot of bright white light and offer portability. They are suitable to create a professional look without a lot of equipment and if you are filming alone this may also be a good option as you do not need anyone else to control the lighting as you can do it yourself. However you can not change the angle or direction of the light as it is always going to be on top of the camera therefore this may not create good effects on a thriller trailer but could be used in other genres such as romance when a light, bright key lighting is needed to create a happy atmosphere.