Candlepower ratings

[monkeyboy]

Just purchased the "5 million CP" torch at homebase here in the UK. I just compared it to my previous "3.5 million CP" torch. They both use 100W bulbs but the hotspot of the 3.5MCP torch is definitely brighter than the 5MCP. At 1 metre the 5MCP is more intense but at long range the 3.5MCP beats it easily. I can only assume that these CP ratings are calculated at 1m which gives a totally inaccurate reading IMO. I propose that CP ratings be carried out at longer distances so that the focal point of the reflector is made negligible.

Anyone else feel the same way?

 

[mdocod]

CP ratings are totally *******ized these days. both of them are probably less than half-a-million "true" CP.

and yes.... they measure at a point in front of the light where the most convergence takes place(1-2 meters usually), but then, for some reason, feel it is OK to multiply by 10-30 for no apparent reason besides marketing.

 

[monkeyboy]

Come to think of it, they probably don't actually measure it. I'm guessing they take a look at the competition and come up with a number that's bigger.

Either that or they calculate the theoretical maximum based on filament surface area, reflector diameter and bulb lumen output which is way higher than what you actually get.

 

[shabbasuraj]

i made a 50 million candle power maglight mod this morning... lol

 

[Patriot]

Come to think of it, they probably don't actually measure it. I'm guessing they take a look at the competition and come up with a number that's bigger.

Absolutely! When it comes to these lights it's a matter of picking a number and making a sticker to slap on them. I've seen Vector's and Thor's candle power figures change because they changed the body color....lol. As mdocod said, it's totally *******ized. I just look and see what kind of bulb they use and if it's driven at 12 volts then you pretty much know what your getting. It sounds like the difference your seeing is purely a result of the reflector.