Here are some differences to consider when picking out Mini Fairy Lights:

Bulb Spacing: This is the distance from bulb to bulb on the light string. This can be the most confusing detail about mini lights. You will see that none of the spacings are perfectly exact. The most common factory spacings are 2.5", 4" and 6". But like I told you, they are not perfect, this can be caused by because the wire between bulbs can be cut a little different, and this will cause the spacing to be a little off. This can take spacings from 2" to 3" and 4" to 5.5". This will be based on the production and factory. Although, we do try to offer the most accurate spacings and check these light strings to make sure we give the most accurate information.
Lighted Length: This is probably pretty self explanatory also, but this will cover the length of wire that has bulbs. This way you can measure and decide how many strings you will need to light certain projects and spaces. This is very easy to determine, all you have to do is some simple math and there you have the lighted length. Bulb Count - 1, multiplied by the spacing and then divided by 12, and you have the lighted length. Exapmle: (100-1) x 4" = 396", 396" ÷ 12 = 33'.
Lead Wire: The distance from the plug to the first bulb. The length of this lead is van vary by the manufacturer and the different batches that are made each year. Sets that are longer have usually have a shorter lead and shorter sets usually have a longer lead. Craft mini lights sets will have longer leads, about 36" and premium mini light strings have about a 4" lead.
Bulb Voltage: Bulbs on mini light strings are not universal. You can't switch the bulbs around from set to set. The bulb voltages are not always the same. Usually, the shorter strings have a higher voltage per bulb and longer strings have a lower voltage per bulb. With the longer 50 and 100 count mini light sets, you will find a 2.5 bulb voltage. With the shorter craft light strings you find anything from 3.5 volt to 12 volt.
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Hannah
Christmas Lights Central
Christmas Lights Central