What is a P21W bulb used for?
P21W also belongs to the family Group 2 automotive bulbs. You can use them for anything except headlights. So when you want to give your signaling or brake lights the upgrade that they deserve, you know what to buy. These are dual beam lamps.
What is P21W?
the P21W is a single-filament bulb, meaning it is either on, or off. The 1157 is a dual-filament bulb, with a low-wattage and a high-wattage filament. For example, your corner lights are dim when you switch on the parking lights, but bright when you use the turn signals. With a P21W, this wouldn’t be possible.
Is P21W same as 7506?
They are the same bulb, just different manufacturer’s numbering (7506 is the Osram number, P21W is the “generic” number).
Are all P21W bulbs the same?
They come in 21 and 5 watts, and 21 and 4 watts. You’ve guessed correctly: they are not interchangeable because the small detents at the base are in different places. Both types are also similar to the widely used P21W lamp which can often be found in indicators and brake lights.
What is the difference between P21W and PY21W?
Yes, the PY21W is the “yellow” (amber) version of the P21W – but it also has a different base. You could probably file one of the tabs off to make it fit in the socket.
Where do W5W bulbs go?
Where does the W5W fit in? It falls under Group 2. This means that the bulb can be used for all types of applications, but not in headlights. A W5W is commonly used in interior lights and sidelights.
Are all W5W bulbs the same?
The T10 comes in 194, 168, W5W, 147, 152, 158, 159, 161, 168, 194, 192, 193 – and they all basically look the same. In fact, they all have the same base, they’re all made the same with the same incandescent filament – the only difference is the wattage.
What bulb is the same as 7506?
Moderator. 7506 is Osram’s number for a type P21W bulb. P21W and 1156 are very similar. They aren’t identical, but they are functionally interchangeable in many cases as long as the 1156 one uses has a nickel-plated base and not a plain brass one.