These hydroponic grow bars are perfect for propagation and seed raising purposes. They're also extremely popular for growing leafy greens, kitchen herbs and pretty much everything else besides high yielding and fruiting plants like tomatoes.
Their slim design also make them perfect for shelving or vertical gardens.
Hydroponic LED Grow Bar Specs:
The lamp itself seems well put together, and the ability to chain them would be useful to some users. However the included plastic hooks don't seem to fit the lamp without modification. I also think an end plug should be included. The output that allows chaining will be live on the last lamp. It's designed so it would be hard to get anything in there, but it could also be sealed.