One of the biggest myths that you could believe in is the fact that - the more the light the better the growth. This is an absolute lie and something that should NEVER be practiced for a healthy growth. In fact, this is actually counter-productive. Light is good, but too much of light can be damaging for your plant and you need to know when to stop. Depending on what you are growing, you need to expose almost any seedling to a minimum of 8 hours of light - and a minimum of 6 hours of darkness. However, for growing marijuana seedlings, we recommend you check how long the sun is out on an ideal summer day and switch the lights on according to that from sunrise to sunset and switch them off from sunset to sunrise.