Hid ?
#2
#9
There is a huge difference between 55w/35w in heat and when i say huge i mean it. With just the bulbs running open on the plastic reflector there was a little warping on the one with 55w.
Please take this with the fact this is only my opinion and real life sampling on my part. Your results may vary.
#10
If you are talking about the Temperature rating then your correct as for brightness in kelvin. but with ddmtuning there is no 55W or 35W bulb there is just a 60W bulb, then if you want it to put out 35W you use the 35W ballast and if you want 55W then you use the 55W ballast.