This headlight thing is confusing.

[Butch 194]

This link has all PAR36 4.5 inch bulbs. All the wattages I think were the same. But look at the candlepower. There are huge differences and I don't understand why. Now at the bottom of the page they don't use candlepower. They use lumens!! So how do you pick which bright headlight to buy? I don't wanna spend the money on LEDs.

http://www.1000bulbs.com/search/?q=PAR3 ... utton.y=13

Thanks

[fourwheels0 191]

the more lumens the brighter they are.

also you want 12 volt bulbs with slip on terminals.

most of those in the first listing have screw on terminals.

look on the left and click 12 volt then click on base and slip on terminals.

i think there's 9 choices.

[TT-(Moderator) 1,162]

These should be the equivalent to the halogen sealed beams used in the 520 models:

Halco 107798

[Raider12 13]

Do they offer an LED bulb that fits the 520's? I could locate one?

[KC9KAS 4,744]

Both candlepower and lumens refer to how much light a light source produces, but candlepower deals in radiance and lumens deal in illumination. Lumens is the more practical term and is often used for measuring the capabilities of LED lights or other devices, since what matters in these cases is how much light is shone on other objects, not how much light is produced from the source. Both terms are used when calculating the power and effect of lights meant for industrial purposes.

Candlepower

Candlepower is a scientific measurement of light at its source or how much light is produce by an object itself. If a lamp has 200 candlepower, then it produces--at its source--the equivalent radiance of 200 candles. Candles themselves are unpredictable in terms of radiance, so the actually value was replaced long ago with an exact metric definition that roughly equals the light an average candle puts out. Technically, this definition says that one candlepower, or candela, is the same as a monochromatic radiation of frequency 540 x 1012 hertz and which has a radiant intensity in that direction of 1/683 watt per steradian. This essentially transforms energy and frequency ratings into light being produced.

Lumens

Lumens, on the other hand, are a measurement of illumination. Radiance refers to the light produced, not its effect on external objects. Illumination refers to how well the light reveals objects, and the lumen is the primary unit of measurement in this field. This is a more practical term that shows precisely how well the light illuminates other objects based on distance. One candela, for instance, is equal to about 12.57 lumens. Lumens are measured by looking at how much light is radiated out from a single source in the center of a theoretical sphere to the boundaries of that sphere.