Headlight bulb

[kartjockey]

http://www.ebay.com/itm/Vintage-Tung-Sol-2220-headlamp-bulb-/370626390697?pt=Motors_Car_Truck_Parts_Accessories&hash=item564b0deaa9&vxp=mtr

[pd]

Is that bulb going to work ?

This from the '60 M model book :



The 2220 bulb is 21/21 cp .

[kartjockey]

Does the later headlight lenses have anything written on them?  My 1948 has it clearly formed right into the glass lens.  (#2220)

[pd]

We're under RED right now . It's kinda wet outside .

The barn is about 50 yards away and I'm not ready for my morning shower just yet .



I'll look ASAP .

[admin]

A 2220 bulb is not 21 candlepower. A 2220 bulb is 6.4 volts, 3.28 amps.  Volts x amps = watts.  Therefore, a 2220 bulb is 21 watts.

There is no conversion from watts to candlepower.  Watts is input energy, whereas candlepower is output.  There is no direct correlation between the two as bulb type, design, and execution all effect output.

[pd]

I chanced melting for this info . ( in case my wife asks )

Here's a few headlight lens pics - 1957 Automatic :



This reads : SCOOT - LITE     K - D 869



This reads : The K-D Lamp Co.   Cincinnati Ohio  USA



There is no other writing on either side of the lens .

[pd]

A 2220 bulb is not 21 candlepower. A 2220 bulb is 6.4 volts, 3.28 amps.  Volts x amps = watts.  Therefore, a 2220 bulb is 21 watts.

There is no conversion from watts to candlepower.  Watts is input energy, whereas candlepower is output.  There is no direct correlation between the two as bulb type, design, and execution all effect output.

Rick ,

I have to ask :

What does the "cp" stand for in a bulb description ?

According to a quick Google search and my life long understanding , cp is an abbreviation for candlepower .

The item description has no reference to watts .

"Offered is an NOS Tung Sol # 2220 6 volt 21/21 cp headlamp bulb, popular during the 1930's. Item comes as shown."

Nor do any of the boxes the early bulbs came in .

Was this a misunderstanding on the manufacturers part ?

[Ricks]

A 2220 bulb is not 21 candlepower. A 2220 bulb is 6.4 volts, 3.28 amps.  Volts x amps = watts.  Therefore, a 2220 bulb is 21 watts.

There is no conversion from watts to candlepower.  Watts is input energy, whereas candlepower is output.  There is no direct correlation between the two as bulb type, design, and execution all effect output.

Rick ,

I have to ask :

What does the "cp" stand for in a bulb description ?


According to a quick Google search and my life long understanding , cp is an abbreviation for candlepower .

The item description has no reference to watts .

"Offered is an NOS Tung Sol # 2220 6 volt 21/21 cp headlamp bulb, popular during the 1930's. Item comes as shown."

Nor do any of the boxes the early bulbs came in .

Was this a misunderstanding on the manufacturers part ?

I think the cp is candlepower, but I believe they are using it erroneously.  Look up 2220 bulb on google and read the technical data provided by Don's bulbs.  This is how I determined the specs on the bulb.