Welcome Guest [Log In] [Register]
Add Reply
batteries
Topic Started: Oct 15 2012, 09:39 PM (226 Views)
darth vader
Member Avatar
Mudking
what is the best battery system
Li ion / pack system or rechargeable AA or single use AAs

how many lumens is enough 120 200 or ...
Offline Profile Quote Post Goto Top
 
Chadders
Member Avatar
Mud Connoisseur
For what???
Offline Profile Quote Post Goto Top
 
darth vader
Member Avatar
Mudking
Sorry For lights for night riding , Just woneders on peoples views on wether the battry pack type things are better or if it is easier just to go fo AAs .
power to weight ratio? ease of handling ? I know I have damaged/ riined battry pack for the old halogen lights by storing the battry uncharged through the summer
Offline Profile Quote Post Goto Top
 
Rob DuPre
Liberally Covered
Firstly , If you are still using Halogens you need to seriously look at an upgrade to LED's.

Mtb Batteries do bike specific battery packs. Li-ion cells made out of 18650 cells soldered together offer value v weight v safety .

Depending on what you want to do in the dark in the woods ,the DX lights are hard to beat for lumens and price .

http://www.mtbbatteries.co.uk/
Offline Profile Quote Post Goto Top
 
belugabob
Member Avatar
Mudking
Ok, as nobody else has said it, I might as well...

"Come over to the light side, Lord Vader!"
Offline Profile Quote Post Goto Top
 
darth vader
Member Avatar
Mudking
Was thinking about a new set of lights and just what sort people found easiest

actually currently I am using an old halogen hooked up to a radio controlled car battery as recc by Chadders and that does me well for an hour or so
Offline Profile Quote Post Goto Top
 
EddyDave
Member Avatar
Bog Monster
darth vader,Oct 16 2012
07:31 PM

actually currently I am using an old halogen hooked up to a radio controlled car battery as recc by Chadders and that does me well for an hour or so

As in an actual car battery with a remote?! :blink:
Offline Profile Quote Post Goto Top
 
darth vader
Member Avatar
Mudking
Ha ja I axtually know some one who still uses a lead acid battery on his bike !

Any one know the difference between a Lumen and a Lux?


Or I might have to go and use the global electric thing
:unsure:
Offline Profile Quote Post Goto Top
 
belugabob
Member Avatar
Mudking
darth vader,Oct 22 2012
06:12 PM
Any one know the difference between a Lumen and a Lux?

About 3 points, in Scrabble...
Offline Profile Quote Post Goto Top
 
darth vader
Member Avatar
Mudking
:D :rolleyes: :D :D
Offline Profile Quote Post Goto Top
 
Ashley1
Moaning Muddy Margaret
This is from one of my books from college!!
lux (symbol: lx) is the SI derived unit of illuminance or illumination. It is equal to one lumen per square metre.
• sunlight on an average day ranges from 32 000 to 100 000 lux
• TV studios are lit at about 1 000 lux [i.e. 1000 lumens
per square metre]
• a bright office has about 400 lux of illumination
• At sunset and sunrise, ambient outdoor light is also about
400 lux (if the sky is clear).
• moonlight represents about 1 lux
• starlight measures a mere 0.00005 lux
Lumens measure "luminous flux". This is a measure of the
total number of packets (or quanta) of light produced by a
light source (e.g. a globe or fluorescent tube). This is the “quantity” of light emitted by the light source. The purpose of lux is intended to tell you how many lumens you need given the area you are trying to illuminate.
Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent light fixture with an output of 1200 lumens. To light a factory floor with dozens of times the area of the kitchen would require dozens of such fixtures. Thus, lighting a larger area with the same number of lux requires a larger number of lumens.
The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · Muddyarse · Next Topic »
Add Reply