You can only burn a Labelflash label on the label side of Labelflash media.
You can only burn a LightScribe label on the label side of LightScribe media.
With a Labelflash burner you can however burn a “DiscT@2” label on the free space on the data side of any recordable DVD media (needs 900 MB free space or more).
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EDIT: And you can burn data to a Labelflash, LightScribe or regular DVD regardless of whether the drive is a LightScribe drive, a Labelflash drive or just a regular DVD.