How to distinguish 1156, 1157, 47386, 1142, 7507, 3156, 3157, 7440 ,7443 led bulbs?

Ba15s vs Ba15d baz15d vs bay15d

Compare Different Bayonet-based parts number. 1156, 1157, 1142, 47386 7507Bayonet abbreviation based on BA with a number. The numbers represents the diameter of the base in millimeters.
BA15 base is an Bayonet base that has a width that is 15mm (0.59in) Buy LED tail/brake bulbs for automobiles, and LED dashboard bulb from our website.
The lower cases after the base diameter is the number of contacts on the base's bottom, and based on the amount of contacts, there are two bases:
d - double contact
S Single contact

BAZ15D vs BAY15D (bay15d vs baz15d): BAZ15D and BAY15D bases both measure 15mm in diameter, boast dual contact points at the bottom, and feature side pins that aren't parallel; with BAY15D's being 180 degrees apart versus 150 for BAZ15D. See image below.

BAY15D PREFOCUS double contact bayonet base, Part no. 1157
If one of the two parallel lugs is greater than the other, the base is called BAY15D (1157) PREFOCUS double contact bayonet base DC Marine

BAZ15d P21/4W dual-contact bayonet Offset pins, part number. 47386
Bayonet base with 15mm of diameter (0.56in) with two contacts on the base's bottom. it has two lugs on the bottom of the base, and the lugs set at 150 degrees from each other.

BA15d (double contact) Part no. 1142
The BA15d base features two contacts at the bottom, and two parallel lugs that are on opposite sides at 180¡Æ apart. Dual Contact Bayonet DC Marine.

BA15s (single contact) Part no. 1156 Single Contact Bayonet
This BA15 (1156) base features one contact at the bottom, as well as two parallel lugs that are on opposite sides 180 degrees from each other.

7506 vs 1156: What’s the Difference?
7506 and 1156 refer to two different types of tail light bulbs sold by Osram Sylvania. The main difference between these two bulbs is that the 1156 bulb has a higher wattage rating. The 7506 is a 21-watt bulb, while the 1156 is a 27-watt bulb (technically 26.9 watts, but close enough). The 7506 bulbs also use a nickel base, while the 1156 bulbs use a brass one. Other than that, these two bulbs are functionally the same. 

BAU15S 7507 PY21W
Bau15s and Ba15s BA15S vs Bau15s BA15S BAU15S and the BA15S BAU15S each have the Bayonet bases with the diameter of 15mm (0.56in) with one contact at the bottom of the base. BA15S (1156) and BAU15S (7507 PY21W) base. Both bases come with two lugs on each sides of the base, the different between the two bases are in the way that BA15s are equipped with lugs located at 180 degrees and BAU15s has the lugs set at 150 degrees apart.  Buy 7507 led turn signal bulb equivalent,  BAU15S/ 7507 LED Turn Signal Light.

16mm Wedge LED bulbs: 3156 vs 3157, 7440 vs 7443

How to distinguish 3156, 3157, 7440 ,7443 the four led bulbs? The 3156 3157 has a W2.5x16D base while the 7440 7443 has a W3x16d base. They are difference in the base shape and size.

How to distinguish 3156, 3157, 7440 ,7443 the four led bulbs?

5202, H16, PSX24W - What's the Difference?

H16 vs. 5202

If your car is equipped with H16-sized bulbs, there could be certain contradictory information while trying to switch them to LED bulbs. The most common cause of confusion when it comes to replacing the incandescent bulbs that are already installed is the fact that the term "H16" has been used to refer to two distinct kinds of bulbs in various areas of the world. In Japan the H16 bulb is in fact an H11-style bulb with the regular H11-sized base and the smaller power. In Europe, "H16" was used to describe the latest 5202 with a tab lock style.

If you're trying to replace your fog light bulb that is H16 in size and your car was built by a Japanese firm, like Toyota, Nissan, Lexus and Subaru choose our H11-sized led bulbs. If your car was made by an American company, such as Chevrolet, GMC, and Ford opt for our 5202 led bulb-sized light bulbs instead.

5202 (H16-EU) vs. 2504 (PSX24W)

What's the distinction between 5202 (H16-EU) as well as 2504 (PSX24W) LED bulb? They're both tab-lock bulbs, but there are different aligning tabs that are on the base. If you want replacing a 5202 light by the 2504 bulb or reverse the process, you could reduce that alignment tab to ensure it is compatible with the factory connector.

Below listed link are our new LED lights for cars.

(image for) 5W LED bulb Decode car led bulb braking light  turn signal back-up light bulb,  7507 led turn signal bulb equivalent, BAU15S/ 7507 LED Turn Signal Light5W LED bulb Decode car led bulb braking light  turn signal back-up light bulb,  7507 led turn signal bulb equivalent, BAU15S/ 7507 LED Turn Signal Light

(image for) 1142 braking light, turn signal back-up light bulb BA15D 10W boat navigation LED bulb 12V 24V Red yellow white1142 braking light, turn signal back-up light bulb BA15D 10W boat navigation LED bulb 12V 24V Red yellow white

(image for) 5W boat navigation LED bulb 12-24V 28V 36V 48V 60V. 7507 led turn signal bulb equivalent, BAU15S/ 7507 LED Turn Signal Light5W boat navigation LED bulb 12-24V 28V 36V 48V 60V. 7507 led turn signal bulb equivalent, BAU15S/ 7507 LED Turn Signal Light