Originally Posted by
KDW4Him
Where did you get the lumens info from? And do you have the candlepower numbers since lumens takes into account efficiency type things such as how much energy is converted into light skewing a true light only output. We don't care how efficient they are just how bright they are, candlepower is just how bright they are. Using Lumens is like saying the LED is twice as bright with a 4 amp draw since it converts more of the 4 amps to light. The Halogen could still have more candlepower. I have yet to see on the road an LED brighter than other bulb types.
Still a skeptic
In order to let the Lumens info be more than hearsay, you can look the specifications up for yourself at the respective manufacturer websites, or the many online comparison tests.
The difference between Lumens and Candlepower (Candela) is interesting, and I had to look it up.
A naked light bulb radiates the light it produces all around. This is measured in Lumens. No matter whether the light source is Halogen, Xenon or LED, Lumens is independent and it just expresses the amount of light produced.
The Headlight reflector and projector make it a narrow beam, in which the Lumens the light produces is radiated within a narrow cone. The brightest part of that beam is measured in Candlepower.
Candlepower is a measure of the brightest part of the beam of a light whereas Lumens is a measure of the total amount of light put out by a light.
A good example demonstrating the difference between Lumens and Candlepower is the laser. Lasers have a very high Candlepower because the light is focused into a single point, but it would have a very low Lumens value because it does not give off a substantial amount light.
So, what makes the Candlepower, is the amount of Lumens of the light used and the reflector and projector (lens) we have in our Crossfire’s Headlight. The Headlight is a fixed factor, cosidering you do not want to change that. Than the Candlepower depends on the Lumens only. Twice as much Lumens in the same Headlight means twice as much Candlepower in the resulting beam.
Candlepower does not matter when we talk Lumens because all that Lumens describes is the total amount of light produced. A light that produces 200 Lumens makes 5 times more light than a light that produces 40 Lumens. To give you a reference, an good old bulb of 60 Watt produces about 100 Lumens.
For this all to be true in a car’s headlight, the light emitting part of a bulb should be in the exact same spot, because the reflector and projector are designed to exactly match that spot. The new generation LED bulbs comply. The only problem we face here is the limited space in the Headlight.