Read the comment page at DX website.... it involve removing tne LED unit and shortening the spring so as not to put too much pressure on the glass and the seal in the front. Some users also complaint about ill fitting batteries tube and 'O' Ring. The QC of most cheaply made China product is well known.
But my backup light (brought from DX) has less part and is of simply design.... it works well during the Hantu Clean Up dive.... but of course, tested to 10 metres only.
I love DX, there are probably 6 dives lights out there right now that's worth taking a look, one that I'm interested in can be found in at this website, www.novaeproducts.com
. Use the range available for reference then X-check the reviews for those torches. Hold off on the 1200lumens first since there has been some problems with that torch for now. Let the guys on Yorkshiredivers suss it out before pulling the trigger
My first P7 900 arrived and was flawless, all I did was remove the front silver bezel, took out the reflector and then cut a round off the spring. The problem with NOT doing this is that when the batteries are in the spring is fully compressed, it is too long to exert outward pressure on the front glass lens and consequently, the front bezel will loosen and the torch will flood. My second P7 arrived with the front body slightly out of alignment with the barrel (this torch breaks up into three parts) so my batteries occasionally get stuck when I try to remove them for charging.
I've logged maybe 20 dives on it now (deepest 27m I think) and I love it though it might not be accurate to say it puts out 900 lumens. (I reckon it was as bright if not slightly brighter than Antacid's Sola which I saw during the cleanup). IT has a nice centre hotspot that punches through muck and a nice spill over the sides comfortable to give a wide view. Lastly, even if it floods there are loads of resources out there to "recover" it.
The other problem is that it does not ship with a lanyard and the hole to attach the lanyard is too bloody small, took a little searching before I found a few options that fitted (Canon OEM Housing lanyard fits good). I'm considering making a simple Goodman's Handle for it with bungee cord, a weight belt retainer and few cable ties.
The W200 was rubbish and I'm about to go through my 3rd replacement torch, the SL3/4/6 as suggest by Siaokao should make a brilliant Backup torch and it is highly recommended that you look for the guy on Scubaboard making the Cree R5 drop in to up the torch to a 320lumens beast. ask nicely and he'll ship internationally. As for batteries, I'm quite okay with it since the 18650 protected batteries only cost 12 bucks and I've three sets.http://www.scubaboard.com/forums/classifieds-lights/309068-uk-sl4-led-w-cree-r2-leds-halcyon-scout-13.html
I don't know of any local dealers for Intova so if you are anal about buying local then look for something else as I've no problem shipping it back to Overseas vendor for replacement.