Even the weight for the candlesticks of gold, and for their lamps of gold, by weight for every candlestick, and for the lamps thereof: and for the candlesticks of silver by weight, both for the candlestick, and also for the lamps thereof, according to the use of every candlestick.
The verse says that the gold and silver candlesticks and their lamps were weighed based on how much they were supposed to be. The weight was determined for each individual candlestick and its lamps, depending on its specific use.