I've moved seedlings from t5s to LEDs, and as long as it's not a huge jump in intensity right away they do fine.
I've also started seeds under the LEDs, and as long as it's at an appropriate height/intensity they did well. My LED didn't have a dimmer, so I raised it up. Most should come with recommended settings for seedlings, and those are a good place to start.
I've also started seeds under the LEDs, and as long as it's at an appropriate height/intensity they did well. My LED didn't have a dimmer, so I raised it up. Most should come with recommended settings for seedlings, and those are a good place to start.