These LED filaments require 3V DC, come in various s and lengths, and can be used for various lighting effects. Typically, you would use the expansion board with
the Pro Controller to control the brightness and sequencing of these LEDs. 
30mm LED Filament x 10
Pack of 10 x LED filaments, 30mm length, 2mm diameter. Requires soldering. Includes 10 x resistors suitable for 5V DC power source (eg from the Pro expansion board). Note the connection end with the hole in is the positive connection.
Price:
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Price:
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Price:
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Price:
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