8 bulb vs 6 bulb tek

[Trigs]

hey everyone i have dilema right now. i am choosing between a 8 bulb and 6 bulb fixture, the 8 bulb comes with all 8 bulbs for 450$ and the 6 comes with no bulbs for 390$ i have a 100 gallon tank 25" tall 48" length and 19" depth i am wondering what my best option is here to go with the 8bulbs at that price and use used bulbs for the next 12 months or go with the 6 and have to buy all new bulbs and pay more just wanna hear some feedback