Betts Industries, Inc. - manlids, discharge valves, pressure and vacuum relief valves, vehicle lighting components and other safety devices for cargo tanks, road tankers, aircraft refuelers, and ISO tank containers since 1901.

Our customer service department fields many questions that require technical assistance from our sales engineering department. We have compiled some of these and posted them here for easy access. If you do not find the answer to your specific question, or would like additional information, please contact us.

1. Question:

What is the amperage draw of the lighting on my trailer?

Answer:

Different types of incandescent bulbs draw different amps, for example the following bulbs that are common on a trailer are listed with their amp draw.

bulb	amp draw	at candle power:
67	0.6 amps	4
68	0.6 amps	4
168	0.4 amps	3
1156	2.10 amps	32
1157	2.10 amps	32

See Engineering Bulletin LD02-99 for more information.

2. Question:

What is the amperage draw of the sealed beam flood and spot lights?

Answer:

bulb	amp draw	at candle power:
4466	4.7 amps	1,000
4415A	2.7 amps	7,000
H7616	2.9 amps	70,000

See Engineering Bulletin LD02-99 for more information.

3. Question:

How can I tell what lamp number I need?

Answer:

Due to the many custom applications for manufacturers we can determine what lamp you need by providing us the following information:

Type of vehicle
Manufacturer and date of manufacture
Lamp model (located on the lamps flange, 40,45,47,200 etc.)
Lens color and type (shallow, deep, deep with license window)
Lamp function (turn only, stop/turn/tail, back up, etc.)
Number of cable or wire entrances and type of plugs or cable lengths installed in the lamp