The Halogen insert 12V GY6,35 has a GY6,35 fitting. Keep that in mind when a bulb has broken down and you want to provide a replacement. Do the bulbs still work, but you want to make sure that you can replace them immediately as soon as one breaks down? You can count on a large number of burning hours, but it is always wise to order a Halogen insert 12V GY6,35 in advance and keep it on hand. The bulbs are available in 20W and 50W power ratings, giving you more than enough brightness.