Kroonluchters
A chandelier needs clearance. Keep at least 210 cm between the floor and the bottom if it hangs in a walkway; above a table it may hang lower, around 75 to 85 cm above the top. Check the weight against your ceiling and use a fixing rated for it - for heavy pieces or a plasterboard ceiling, call in a professional.
Use the same light colour in every fitting, otherwise the effect looks restless. Cleaning is done with the power off: dust with a soft cloth and wipe loose glass elements separately, never spraying cleaner onto the fittings.
See also pendant lights.