Your right side headlight-passenger-will always be higher because of the cutoff/shield. Projector headlights have cutoffs/shields that produce more light/higher on the right side, or a step they call it, and less/lower light on the left-drivers side. This is done so you don't blind oncoming traffic on the left(driver) and so you can see pedistrians on the right(passenger) side. I had the same problem for awhile with how bright each light actually was though. You need to make sure your HID bulb capsules are positioned correctly inside the housing. IE. if one is pointing upward, you will get more light above the cutoff/shield causing more light to shine outward. Same for left or right positioning, or downward positioning. I use to tweak my bulbs alot to get the perfect light output and color off the cutoff. I like the unique blue look, and would space my bulb backward away from the housing to produce more blue/purple along the cutoff and give it that highend car look and also if shield is alittle closer to lens produces color at a distance. Now, I have fully modded my cutoff/shield by painting, z-tail/prism tail mod, and moving shield/cutoff closer to lens. All this does something different. This does not effect overall light output by the way. Since our vehicles aren't made for HID's, you need to make sure the bulb is spaced right for the halogen housing. I did alot of research on this prior to purchasing HID lighting, in my halogen housing since HID isn't made for Halogen housings.
One peice of advice, all HID bulbs are different usually, so I would remove HID bulb, set on peice of paper, mark the base with a line, mark the middle/filament with a line, and the end of the bulb with a line.
Then get halogen bulb and do the same thing. What you are trying to achieve is that the HID bulb/capsule is in the same position as the Halogen bulb. If not, light output will not be produced right out of the halogen light housing. Meaning, you need the HID filament to by in the same position as the halogen filament and also good to have end of bulb same distance away from shield/cutoff
Like previously stated, also moving bulb left/right in the housing causes different output along the cutoff/shield-may be brighter on oneside then the other along cutoff.
Moving bulb up/down in the housing causes different output along the cutuff/shield by either sharper cutoff line at a close or distance,more color,more light infront of car or away from car. \
All these iterations can produce different affects or light ouput through projector lenses.
I myself, space my bulb back away from the cutoff/shield and downwards just a tad. This outcome produces correct positioning of the bulb for the best light output and adds color along cutoff/shield and also color is visible from a farther distance and cutoff is sharper. It's alot to take in, but HID's in halogen housing aren't just PnP!!! You still need to position the bulb correctly. What people don't tell you!!!
---------- Post added at 11:52 PM ---------- Previous post was at 11:49 PM ----------
Also, Don't know anything about DDM kits, but have bought bulbs from others, and bubls aren't always the same. Sometimes you either get 2 bulbs of different colors, which will make one look brighter then the other. Or, just a bad bulbs that has lost it's quality. Not saying DDM sells anything bad, but I would either go with OEM products. Or debased bulbs. Much better quality.
---------- Post added at 11:55 PM ---------- Previous post was at 11:52 PM ----------
You want your left headlights high step part of the cutoff to intersect with the right sides high step part of the cutoff. and vise versa for the lower part of the step. Again, this will produce a look of more light coming out the right/passenger side of the car.
