Installation Issues:

These LED headlamps are designed to be simple plug and play units, however, while installing, I could not get them attached to the bulb receptacle. Rubber/Silicone boots which provide dust and water protection to the headlamp interior seems to have an issue and needed some work to get them to accept these LEDs. The modifications I made to the boots does not compromise its dust and water resistance and they can absolutely work again with halogen bulbs!

The LED lamp needed to be installed a little differently by first removing the notched metallic collar , fixing the collar to the headlamp bulb receptacle, securing it  with the wire clip, sliding on the protective rubber boots and then inserting the LED unit and twisting it into a locked position. 

The portion of the rubber boot which goes around the neck/stem of the bulb was interfering with the locking of LED bulb and I had to trim about 2 mm of its length. 

I also needed to remove four protrusions on the back of boot. They were interfering with the complete insertion of LED bulb and getting in the way of heatsink. 

I did a mock assembly on my desk before heading out to the car

Now, need to repeat these steps in the car.

Comparison Test (Halogen Vs LEDs).

Wall distance = 13 feet.

Verdict:

100watts halogen definitely looks a shade brighter and more focused. I still have to do real world test and night time drives to get to a fair conclusion. 

I will post updates later.