These craft lights come with a single plug that has slots (for lack of a better phrase) in the top of each male connector that allow you to plug a second set into the top of the first. (Thinks those stacks of plugs in the middle of all your Christmas tree lights.)
Even if the lights are not run in series, the fuses determine the maximum number of lights sets that you can stack into a single plug. That's what that specification is all about.
If one bulb does out, will the others go out?
All of our mini lights - these crafters lights included - are constructed so that if a bulb "burns out" the rest of the lights will stay on. However, if a bulb housing is damaged, a bulb is unseated or removed from the socket, it will take down the rest of the strand.
What do I do to get extra replacements?
Your craft light string will come with 2 replacement bulbs and an extra fuse. We don't sell replacement bulbs by themselves. If you'd like to have several replacement bulbs on hand, consider purchasing an extra string of lights just for that purpose.
Also consider keeping all of your bulbs grouped together in labeled envelopes. Some of the replacement bulbs for the strings have different voltage ratings so you want to keep like bulbs with like strands.
How long should they last?
These light strings are rated for an approximate 2000 hours of use. We warrant them for 90 days of normal seasonal use. The biggest factors in the ultimate lifespan of your lights are hours of usage and temperature.
If you over-fill a sealed container with lights, heat will build up inside the container and will accelerate the aging of your light set.
Do these lights get warm?
In a word, yes. Be sure to operate your lights under supervision and don't cork off your bottles when the lights are in use. If you sell light-filled bottles and blocks, make sure you add a hang-tag or a sticker to your projects letting users know that the containers will warm up and caution them against placing them on heat sensitive surfaces.