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You do not see the LED glowing in the dark? I am convinced, that the same part will be broken as usual. It is always the same part that will be burned. And your impression is right, I do sell the lights and also spare parts. The problem for you is, in Germany I normally do sell to my customer...

The first MJ-810 produced before 2011 had a drowning problem. Since version E no problems have occured anymore. But! The actual series shows a funny behaviour. It is possible that the light flashes when you switch from one state to an other. Michael

The dimensions are 33x2.65mm Michael

You should replace the red o-rings by harder ones with the same dimension. The red ones work, but you have to be very careful concerning grease. Standard black o-rings are better. If you do not have a strobe mode, then you have probably not the PCB that caused so much trouble. Michael

That seems to be the actual version. Michael

You need a special tool to do that correctly. You can try following: unscrew the black plastic part and remove the battery contact. Place a suitable screw at the place of the battery contact. screw the black plastic back at its place. pull at the screw to remove the holder of the PCB. ! I do...

Do you have the P7 version of the MJ-810? It is a common problem of the MJ-810 P7 that it fails to switch on under water. Everything will be fine if you switch it on at the surface. I still don't know why this happens, but I am investigating. I know this problem only for the P7 version. I do...

dered some spare o-rings where you bought the light? Is the dive shop not able to order spare parts for the light they are selling? Michael

dered some spare o-rings where you bought the light? Is the dive shop not able to order spare parts for the light they are selling? Michael

The price for a 810 replacement PCB is 9€ (13$), a 850 replacement PCB costs 12€ (17$) Michael

Do you mean the silver ring of the 850 or the bezel of the 810? You need a special tool for the 850. If you do not have this tool then you can use an open scissor. Spare parts for 810 are also available. I know that many shops just want to sell complete lights, but that is not my mentality...

Hi Maurice, You have mail. I have just read your blog about the defective light. That sounds like the always defective part of the old blue PCB. You can not turn off the light, it shines always at about 5%. I will insert a picture this evening, then you can compare the new and the old PCB. I...

Of course. Every piece is available as spare part. I sometimes write here in this forum, but as you can see I am located in Germany. Cheers, Michael

MJ-850 is not known for for flooding! I have sold a lot of these lights and just one was flooded. The silver Ring at the front glas was not screwed tightly. Not a fault of the light, but of the quality control. But there is an other issue. You should check wether your PCB is green or blue. The...

"A little more info... I tried re-striking the light in a dark room and iI can see that the bulb flickers just a bit" The bulb is broken! Michael

It is so easy to focus the Darkbuster! Just put a 1.8mm aluminium ring between the bulb and the reflector and you will have a pefectly focussed light! That is something we always do before we deliver those lights. Michael

Then buy it from abroad. You will find the distributors on Brightstars website.

Hi adstaa, Belive me, you will not be happy by going back to halogen. Just buy a more robust HID light. Michael

UK100 half the price of the Darkbuster???? You are kidding! The 10W Darkbuster costs about $300, but including a 5200mAh LiIon battery and a charger for AC and DC use!!! calculate the price for those parts to the UK light and you will have almost the same price. The Darkbuster Junior is even...

Hi, here in Europe only the post-fixed lights were delivered. And as far as I know the version with the leking problem has never been sold. That was the reason why the light version 2 came out so late last year, they did a lot of researches to deliver a light with a good quality. The only...