Drawing-Tube Schott Glass P43T or P45T H4 car halogen light
1. optical transmission . Good optical transmission makes it have more luminous flux than quartz at the same power (watt). So it is brighter.
2. thermal expansion coefficient . Its thermal expansion coefficient is much closed to that of molybdenum. So it works perfectly without the help of the molybdenum belt.
3. lamp protecting. For schott glass can filter out UV radiation, auto lamp can be protected to a certain extent.
Disadvantage: it can not meet with cold water when it is working, or, it will blast.
Packing detail: white paper box, plastic box, colorful paper box
Secification Table
| Model | Volts (V) | Watts (W) | Lumens (lm) | Base Type | Osram NO. | Philips NO. |
| H4 | 12 | 60 55 | 1650±15% 1000±15% | P43t | 64193 | 12342 |
| 12 | 100 90 | 2300±15% 1500±15% | P43t | - | 12569 | |
| 24 | 75 70 | 1900±15% 1200±15% | P43t | 64196 | 13342 | |
| 24 | 100 90 | 2200±20% 1450±15% | P43t | - | 24569 |