Fluorescent tubes may not be as energy efficient or long lasting as LED tubes, but they're still very popular. They come in lots of different lengths and sizes and there are lots of different specifications to choose from too. When replacing fluorescent tubes, you need to make sure the ones you select are the same length and size as your current ones and that they have the same caps as well. If you want the new fluorescent tubes to provide exactly the same light as before, you'll need to match up other specifications too. Be aware that by switching to LED tubes, significant savings on energy bills can be realised.