25 WATT

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A friend gave me this cool info about the Spiral and Ball lamps from J. L├╝ber.
It says how to put together the lamps but also another info I never seen before.
It says that you should use lamp bulbs with 25 watt if you want the best colours.
I have used 40 watt or even stronger before but 25 watt (matte bulbs) looks better.