As with most things in life, you get what you pay for. Always buy the best lights your budget will allow. You just cannot cut corners with your lighting in your garden.
We did our homework. You should do your due diligence also. This PDF explains some important things you need to know before you make that all important decision.
PAR, PPF, PPFD, and DLI
At Green Rush Farms we use the Viparlux from
(click above for website)
"Everything a horticulture light should be."