• 6 pack
• NCE Light-It Decoders are available in 3, 6 and 15 packs (search 161, 162, 163)

From the NCE manual:

Adding anti-flicker capacitors to the Light-It: When the Light-It (or any decoder) is used as a mobile decoder getting its power from the track through rolling wheelsets the power is likely to be intermittent thus causing light to flicker. It is possible to add capacitors to provide ‘keep alive’ power so that the lights will remain constant over dirty track. The diagram (photos) shows how to add two supercaps to the decoder that will provide sufficient power to keep the LEDs lit for many seconds when traveling over dirty track. NCE part number 5240306 which will be enough capacitors for 3 decoders. These are 300mF 2.7 volt supercaps measuring 5/32” (1.5mm) x 1/2” (12.5mm) each.