I have no experience with bikeray, however I own 3 Magic Shine lights. The Magic shines are killer for mountain biking in the dark with a nice focused beam perfect for helmet mount application (i have a niterider light on my bars) The MS lights are great for the price, the only concern I would have is that ive heard their warranty is essentially non existent. Take that into consideration as niterider lights have a great warranty and most of their products are made in the USA(but not all). Additionally, I have many friends who swear only by light and motion lights. Just food for thought.