I came across a line while randomly going throught Gurbani tuks..

ਪਹਿਲੈ ਪਹਰੈ ਫੁਲੜਾ ਫਲੁ ਭੀ ਪਛਾ ਰਾਤਿ ॥
The first watch of the night brings flowers, and the later watches of the night bring fruit.

ਜੋ ਜਾਗੰਨ੍‍ ਿਲਹੰਨਿ ਸੇ ਸਾਈ ਕੰਨੋ ਦਾਤਿ ॥112॥
Those who remain awake and aware, receive the gifts from the Lord. ||112|| 

What made me wonder, was what is the difference between Flowers and Fruit.. What times was Sheikh Farid Ji talking about..?
When I asked a vidhvaan - Well my beloved gatka teacher (aka the ONE lol) he explained the following to me..

Sheikh Fareed Ji was a next level person; His thinking was way above the normal wave of thinking. Therefore, the above lines shouldn't be taken literally.

There are four types of amritvela: -

Life is amritvela - After countless of lifetimes of darkness, going through the 8.4 million lives; This life is the chance for 
us to Jap Naam and become Jeevan Mukht

The Last Pehr of Night (12am to 6am) is amritvela - It is the quietest time of the day; Best to Jap Naam

SatSangat (the true congregation) is amritvela - Each person multiplies the Power of 
Naam as it is recited together in harmony

SaadhSangat (company of Saints) is amritvela - Since the Saints have high Avasthas, you get to experience their power 
through you.. Helping you to Jap Naam

..So if we Jaap Naam in Sangat between 12am and 6am.. (there might be a chance
that a Sant is sitting among them too)..then we would experience all 4 amritvelas at the same time!