THWANG-666
Senior Retro Guru
i want to convert my electron twin 5 +10 watt lights to 3W Luxenon leds what i need to know is the leds are 80 lumins so what is that in watts?. are help greatly Appreciated.
cheers thwang
cheers thwang
DIY lights
- Thread starter THWANG-666
- Start date
Hi
i realise that this post was a while ago - but just incase your interested
watts is electrical power
lumens is total light output
the only way that these things can be linked is if you include efficiency
a 3w lux uses 3w of electrical power to make 80 lumens
a 10 watt halogen uses 10 w of electrical power to make aprox 200 lumens
but if you want to do this now (may 2007) then id use a cree or seoul emitter that will provide 220 lumens for about 4 watts of electricity
im currently building a light with 2 cree emitters using about 8watts
that will provide over 400 lumens ill post a photo when ive finished
Alex
i realise that this post was a while ago - but just incase your interested
watts is electrical power
lumens is total light output
the only way that these things can be linked is if you include efficiency
a 3w lux uses 3w of electrical power to make 80 lumens
a 10 watt halogen uses 10 w of electrical power to make aprox 200 lumens
but if you want to do this now (may 2007) then id use a cree or seoul emitter that will provide 220 lumens for about 4 watts of electricity
im currently building a light with 2 cree emitters using about 8watts
that will provide over 400 lumens ill post a photo when ive finished
Alex
THWANG-666
Senior Retro Guru
hi alex
i,m building 2 sets 2x3 watts luxeon stars and 2x 3 watt soul p4 when i get around to starting them had all the bits for months just havent time to build them.
cheers thwang
i,m building 2 sets 2x3 watts luxeon stars and 2x 3 watt soul p4 when i get around to starting them had all the bits for months just havent time to build them.
cheers thwang
cool
i thought id start mine in the summer so that they will be finished by winter
but they will actually be finished in about a week!
for about 50 quid you can make a totally custom light that beats a cateye triple shot and is as bright as H.I.D systems
mine looks bling too so keep watch and ill post you some pics
(as well as a retro geek im a torch geek!)
i thought id start mine in the summer so that they will be finished by winter
but they will actually be finished in about a week!
for about 50 quid you can make a totally custom light that beats a cateye triple shot and is as bright as H.I.D systems
mine looks bling too so keep watch and ill post you some pics
(as well as a retro geek im a torch geek!)
THWANG-666
Senior Retro Guru
do you know how to calculate your burn time with the battery
erm
kind of
it is simple maths
eg)
say you have 1 led and your using 3x2200mah batteries in series
then it will last just over 2 hours
this is why...
led will draw 1amp(ish) at 3.9v (freshly charged batteries)
if the batteries are 2200mah thats 2.2amps
so all you do is 2.2amp/h / 1amp = 2.2 hours
but this will not be that accurate because as the battery drains the amp draw will go down and the led will get dimmer
what use is 2.2hours if half of that time the led is too dim??
the best thing to do is use a driver (little circuit) - that supplies a constant current - so the led stays the same brightness (for a shorter time) then just goes off when batteries are empty.
hope you understand all that
Alex
kind of
it is simple maths
eg)
say you have 1 led and your using 3x2200mah batteries in series
then it will last just over 2 hours
this is why...
led will draw 1amp(ish) at 3.9v (freshly charged batteries)
if the batteries are 2200mah thats 2.2amps
so all you do is 2.2amp/h / 1amp = 2.2 hours
but this will not be that accurate because as the battery drains the amp draw will go down and the led will get dimmer
what use is 2.2hours if half of that time the led is too dim??
the best thing to do is use a driver (little circuit) - that supplies a constant current - so the led stays the same brightness (for a shorter time) then just goes off when batteries are empty.
hope you understand all that
Alex
THWANG-666
Senior Retro Guru
hi
yep got it
yep got it
finished my light - well nearly
heres a link to it
http://www.candlepowerforums.com/vb/sho ... p?t=166804
heres a link to it
http://www.candlepowerforums.com/vb/sho ... p?t=166804
THWANG-666
Senior Retro Guru
that was fast i,m still on the holders design the third holder is one of those cheap led lights off flea bay
very nice
i went the same route as you last winter with the cheep holders and the single torches modified
but then i saw some posts on CPF and wanted to make something totally custom and bright
when i put the 3rd light in it will be as bright as a H.I.D system but at way less cost ( and slightly better runtime)
1 cree p4 torch is enough light really but nothing beats lighting all the forest up at midnight
Alex
i went the same route as you last winter with the cheep holders and the single torches modified
but then i saw some posts on CPF and wanted to make something totally custom and bright
when i put the 3rd light in it will be as bright as a H.I.D system but at way less cost ( and slightly better runtime)
1 cree p4 torch is enough light really but nothing beats lighting all the forest up at midnight
Alex
Similar threads
