
I measured this item next to an existing T5 fluorescent bulb. This product is about 2mm longer than the fluorescent T5 that I replaced. I was able to install all 6 blocks, some easier than others. I had to use brute force to install a unit, bending the metal holding the tubular socket to force the new LED tube into the socket. The bottom line is that some lights are difficult to install, while other lights from the same manufacturer are easy to install. A difference in length of 2mm can be a problem. Other than that I'm quite happy with these replacement parts but not enough time has passed to test durability etc.

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