1 million candle power is equivalent to how many watts?
08-13-04, 02:23 PM
#1
Junior Member
Thread Starter
Join Date: Mar 2003
Location: SoCal
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
1 million candle power is equivalent to how many watts?
I found a $15 portable handlight that puts out 1 million candle power. If that is equivalent to at least 10 watts then I am getting it.
08-13-04, 03:26 PM
#2
Castiron Perineum
Join Date: Jul 2004
Location: Taking a tip from Siu Blue Wind, I too am typing a lengthy passage of text down here to demonstrate the enormous amount of space available should one wish to use it-- in sharp contrast to the avatar text above this part.
Posts: 1,199
Bikes: '06 Salsa Campeon, '84 Cannondale R1000, 80's Nishiki Ariel
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 0 Times
in
0 Posts
I'm not certain the two are interchangeable as a unit of measurement. Candlepower is an expression of Lumens (1,000,000 Candlepower=12,566,370 Lumens), whereas 'watts' are a measurement of resistance.
08-13-04, 03:51 PM
#3
I couldn't car less.
Join Date: Nov 2003
Posts: 4,397
Bikes: Ritchey P-series prototype, Diamondback, Nishiki Triathelon Pro.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Originally Posted by bunabayashi
I'm not certain the two are interchangeable as a unit of measurement. Candlepower is an expression of Lumens (1,000,000 Candlepower=12,566,370 Lumens), whereas 'watts' are a measurement of resistance.
Like xenon gas lamp compared to an incandescent vacuum bulb.
This is probably correct " (1,000,000 Candlepower=12,566,370 Lumens).
08-13-04, 04:06 PM
#4
You need a new bike
Join Date: Aug 2002
Posts: 5,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 4 Times
in
3 Posts
I think you will find that the light in question requires much more than 10 watts in order to generate a million candlepower of light.
08-13-04, 04:37 PM
#5
Junior Member
Thread Starter
Join Date: Mar 2003
Location: SoCal
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Let me rephrase the question. Is 1 million candle power as bright as a 20w MR11 bulb?
I found a $15 rechargeable handheld spotlight that puts out 1 million candle power. If I can "macgyver" the light to the handlebars it would make a great headlight.
I found a $15 rechargeable handheld spotlight that puts out 1 million candle power. If I can "macgyver" the light to the handlebars it would make a great headlight.
08-13-04, 05:34 PM
#6
Senior Member
Join Date: Jul 2004
Posts: 65
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
i have a million Candela power spotlight for night fishing. that sucker is crazy bright. if you had that on a bike you would light up the entire woods, or at least blind all the animals.
08-13-04, 06:40 PM
#7
Evil Genius
Join Date: May 2004
Location: Sumner, WA
Posts: 1,529
Bikes: '92 novara ponderosa, '74 schwinn le tour, Novara fusion, novara transfer, novara randonee(2), novara careema pro, novara bonita(2).
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Depends on the type of light but I think basic halogen is a good standard to compair though xenon halogens are more efficiant. A 35 watt hand held halogen spot light is about one million candle power this would be, very roughly, a 25watt LED or 20 watt HID.
On a six volt system 35 watts will draw about 6 amps(6v*6a=36watts) so you will need 6 amp-hours of battery per hour of run time.
Depending on the type of battery you should leave a large reserve because deeply draining a battery, say a lead-acid(cheap kind), can reduce its life very rapidly, the same goes for not keeping it topped up for long periods.
A nicad should be charged absolutely full then drained close to dead then charged full again when its new be cause nicads have memory and will not hold a large charge if it was short cycled when new.
Ni-mh don't have a memory as far as I know and can be deep cycled and rapid charged, basicaly are the best, lightest, rechargeable thing going but they cost some big coin.
On a six volt system 35 watts will draw about 6 amps(6v*6a=36watts) so you will need 6 amp-hours of battery per hour of run time.
Depending on the type of battery you should leave a large reserve because deeply draining a battery, say a lead-acid(cheap kind), can reduce its life very rapidly, the same goes for not keeping it topped up for long periods.
A nicad should be charged absolutely full then drained close to dead then charged full again when its new be cause nicads have memory and will not hold a large charge if it was short cycled when new.
Ni-mh don't have a memory as far as I know and can be deep cycled and rapid charged, basicaly are the best, lightest, rechargeable thing going but they cost some big coin.
08-13-04, 08:07 PM
#8
Senior Member
Join Date: Jul 2004
Location: Evanston, IL
Posts: 817
Bikes: Felt F5, Fuji Robaix Pro and a KHS Mountain Bike
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Yeah I would think that less than half of that would be more then sufficient, this does raise the question of why do all the company advertise watts and not lumen. I feel like that would be a lot more telling especially since all the LED company try to say how bright they are.
