That I know, the Acura TL bulbs are different from the X's. The TL's are brighter than the ones in the X. My wife has a 2010 TL and I can always see the difference. Once I talked to the Acura part person and he told me that the TL is lower so it can use brighter bulbs without blinding the oncoming traffic.
Below is the high output OSRAM HID bulb, I think the specs were almost double the lumens from the normal OEM HID bulbs, but they are not easy to find and there are many fakes out there.
D2S: Osram Xenarc 66240 CBI - HID Bulbs from The Retrofit Source Inc
The latter info was from a discussion in the following post:
Seriously disapointed in the hid light out put from the projectors.
Ive tried all kinds of different kelvin temp colors and ive tried 50watt bulbs. Why are these lights so dim. My tl projectors are amazing with 35watt bulbs. Theres gotta be a way to fix this.
2011 Pearl White MDX Advanced
... OEM towing, 20 mm wheel adapters,
... rails/crossbars, black wheel well trims,
... side windows acrylic deflectors,
... Michelin Latitude Diamaris HP 285/45R19,
... Full size spare tire,
... 6000 Kelvin HID's
2010 Acura TL Tech.
2001 Mercedes ML 320
2005 Mercedes ML 500 AMG Package