First the mold is happening for one reason......TOO much moisture at one point of your growing expierience.

Soaking too long.

or watering too much after the seconf day the seeds are in your trays.

Also are you using air-conditioning or fans for good ventalation?

Forget the grow lights and stick with good morning defused sunlight.....perhaps you are getting afternoon sun on the north side of where you grow.

Where is your kelp meal coming from(America...Canada...Norway?

Bottom watering can be helpful contoling mold.

NOT over watering is the answer to your problem./