Our uv light is attached to our water supply after the filter. The system we have the normal life of a bulb on 24-7 is a year. If the bulb goes out the system lets out a warning chime to let you know to replace it.
When I used bleach for my chlorine source I used Stenner pumps. drill a hole in the lid of a bucket the size of the tube and fill with bleach. the pump is adjustable.