[9phil9]

OK I see that no answers are forthcoming from this forum, so I dug into it another way.
HID's are a simple install on the TCH, IF you have the correct wiring harness.
Apparently you need something special to keep the computer from showing an error when you turn them on.
The genuine MTEC line has just such an install kit for the 2077-2008 Camry.
AND you don't have to worry about the DRL's, because they are on your High Beam circuit, not the Low Beams.
So the DRL's, and the Auto headlights feature will still work as normal.
Plus with the advantage of the HID's drawing only 35 Watts, instead of 55 watts, like the stock Halogens do, the reduced electrical load should help improve your gas mileage too.
(After all, you don't get something for nothing.)
But saving gas will NOT pay for the lights.
So the real reason you install them is for the triple light output, and the longevity of the bulbs.