Thread: CREE XM-L T6 1800Lm battery options
View Single Post
Old 02-27-13, 09:41 PM
  #13  
zacster
Senior Member
 
Join Date: Jul 2004
Location: Brooklyn NY
Posts: 7,728

Bikes: Kuota Kredo/Chorus, Trek 7000 commuter, Trek 8000 MTB and a few others

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Liked 464 Times in 365 Posts
Originally Posted by adclark
I haven't ever used the 18650 batteries so I can't speak to that. On another note, if the light only has one LED, I don't see how 1800 Lumens is even possible. According to the datasheet from Cree, the XM-L line of LEDs, "...can deliver 1000 lumens..." unless I am reading it wrong. The data sheet I found was here: http://www.cree.com/~/media/Files/Cr...g/XLampXML.pdf
That, plus the fact that they get 100 lumens/watt MAX, means that any light producing 1800 lumens would run out of power on a 18650 battery in about 15 minutes. 2400mahx3.7v = 9wh, OK, maybe 30 minutes. Only that if you're lucky.
zacster is offline  
Reply