I have transit in Hong Kong for 8 hours from 8.30 am to 4.30 pm on the 18th of November.

For your limited transit time, I recommend the Citygate to you. It is famous shopping outlets in HKG and you can find many branded products with great discounts. To get there, you can take a taxi to reach at a cost of around 110HKD. Or take shuttle bus line S1 to Tung Chung in 25min. Then walk to the outlets in 3-5min.