I think it's important to know why you want/need the candles. I know that several old-world Christian practices were HEAVILY based in the occult. Most of them have been abandoned by protestant churches, but some still exist. However, it's not entirely a problem. Even in the specific cases that the Bible DOES warn us about, it's nearly always because the occultish practices appeared TOO similar, and the warnings were designed to separate the Church from the occult.
So, candles, strange robes, and crosses are not inherently evil, such activities may be viewed as strange or scary. Likely to associate you very closely with the occult. People should see Christ in you, not ritual. Yeah, I do some things that link me closely to rock-n-roll and the goth movements, but even in those groups, I stand out as separate. And it's been a witness for me, because my friends know what I won't do. And they know, that I didn't have to change my appearance and my "likes" just because some guy in a suit told me too.
But with candles and stuff, it is trickier. If any of my goth friends would see me do something like that, that would ruin any testimony I have with them. yeah, they'd possibly accept my religion a bit more freely, but only because they would see it as watered down, and no more real than what they do.
So, if candles help you concentrate, or calm you down and help clear your mind of all your daily turmoil before going to the Lord in prayer, then more power to you. Just be very careful who sees the candles, and how you arrange them in between times.