Unlike most heavy duty festoon lights, these connectable festoon lights do not require you to purchase separate transformers, so are a good affordable option, and each set comes with a fitted uk 3 pin plug and can be connected up to 10 sets in total, giving you the option of 50 meters. There are 10 x g50 style bulbs, 'g' refers to it being golf ball shaped, and the 50 is the diameter measurement in mm. Each bulb contains 5 bright leds and the bulbs are a mixture of red, white, green, yellow, and blue. These mixed colour sets can also be mixed and matched with the g50 festoons in white. This is a new product september 22, other sets we offer are not compatible, only connect to the same g50 style sold by us since september 22 10 x g50 bulbs each containing 5 ledsmulticolour bulbs5m lit lengthip4424v fitted transformer plug included5.4m cable from plug to first bulb