There are few reasons.
Many go for HIDs above 6000k which are blue. This is not allowed. Anything below 6000k is safe, but even in some brands 6000k have bluish color.
4300k is the legal one which is white in color with a tinge of yellow
6000k pure white
HIDs in projectors are safe and wont attract cops if used properly. HID's used in normal headlights will certainly attract them. The reason being, in normal headlights, the lights get scattered which will blind oncoming traffic. In projectors, the light is projected onto a particular area. Safe for oncoming traffic.
I would recommend HID's in projector setup with 4300k and fog with 6000k HID.
And one more doubt , my friend who is having a HH Hunk got a HID kit for Rs.1500 without B/W. The problem is it cuts-off automatically if we use it for more than 10 minutes and does not switch ON for another 10 mins. And then after that it works fine for another 10 minutes and again it cuts-off! Whats the issue with this?? The HID works in high beam!
And in cars does the HID work in both the high and low-beams??
Fazer has dual head lamp , but one lamp is low beam(left) and one is for high beam(right)
Warrenty helps to get replace if any manufacture fault is there and obly branded good one gives them ,
though grey piece , branded but legal in other countries -sold in india dont have warrenty but are reliable.
For the sum of 1500 , i think it must be a chinese make and for the switch off reason fault may be in ballast unit , else in rectifier of bike else in battery.
If you dont get the bike checked , one by one will stop working. check and replace asap
As ilango mentioned, these cars have two separate bulbs. One for Low and other for high. For these, you will need two HID kits. 4 HID bulbs and 2 pairs of ballast. I would recommend to stick with HIDs on low and higher rating halos on high (white output). This best example would be the new corolla altis. It's got 4300k HIDs on low and normal halos on high.
Laura has HID projectors for Low and normal halos for high.
High end cars like Audi, BMW got projectors for both.
My car got a single projector setup which use a single HID bulb for low and high.
Projector cost vary for different cars. For eg, The twin eye projector setup for Swift (Old model) is around 9k without HIDs and the Single full CCFL projector setup (The one I have - new model) is around 13k.
HIDs without projectors will definitely blind oncoming traffic. So I wouldnt recommend this. The road visibility will be bad without projectors. Usually, HIDs without projectors are meant for show off.
Corolla Altis got a 4300k HIDs on low beam only. The high beam is normal halos. There is no projector setup for Altis.
Laura got projector for low and normal halos for high.
You can check out Philips with a rating of 100/90. This will require you to fit a relay too..
I had used Osram Cool Blue before.. There's a rumor that if you use higher rated bulbs, the headlight reflector gets burned. So try not to use this long time. I used this only for around 3 months.
But since this is for high beams and not used that often, i think you can go for these...