Thanks. I'm just looking for a light that I don't have to modify. So what you're saying is the fake Solarforce > WF-502B > WF-501B in terms of body? The brightness of all 3 should be the same?
Generally yes although it depends on your requirements. Bear in mind I don't actually own any yet but from what I've read the fake L2s appear to get good ratings. There's also a chance to mod them with either genuine or fake Solarforce accessories. You may be able to do this with the others as well but it's probably less likely.
The WF-501B is the smallest which is good if you want small but does mean it's also likely to have the worse heatsinking. The WF-502B does tend to have the worse contact between dropin and head (see http://budgetlightforum.cz.cc/node/273 & http://budgetlightforum.cz.cc/node/417) which you definitely should mod and probably reduces the heatsinking improvement from the larger body.
In my case since I'm planning to put it on my bike and ideally want at least 20 mins constant runtime on high so good heatsinking is a must.
P.S. Forgot to mention earlier but added it now that another factor in favour of LT for me was that I'd hopefully get better support then KD since I've communicated with Daniel a lot
using a 5 mode KD dropin from a Ultrafire 501b
My Kaidomain 5 mode R5 XPG drop-in that came in a Suterfire G2 burned out after less than 5 minutes on high.It just suddenly quit and the brass driver/pill part would get very hot w/ a burning smell when turned on again.The LED itself was not visibly burned.The light had less than one hour total run time.I have not had any trouble with single mode R5s from DX or Solarforce.
I think you have been unlucky. I have one from a ultrafire 501b 5 mode in my Skyray and another in a 502b both have seen a fair bit of use and no problems.
The Skyray an hour tail standing on high no hint of overheating.Very warm to touch but I wouldn't say hot beam was still white.
FlexakaMal
What part of the body is very warm to the touch?
How long does the head or body take to warm up?
Run the light for 5 mins the touch the pill and reflector is it really hot?
The torch head is warm reflector/pill is hot pleasantly hot on my cheek, mind you it is currently 4 deg c in my house..