Eyefor Posted October 18, 2013 Report Share Posted October 18, 2013 (edited) Some help / advice please. I used a Lightforce 140 for the first time yesterday (bought - not new - some time ago) and the lamp has a dark hole in the centre of the light spread - exactly where you don't want it. I have tried max in & max out on the focusing but, although the size of the hole diminishes as the lamp shroud gets closer to the handle, I run out of adjustment. This doesn't happen on my 170's so could it have a wrong bulb fitted? Any suggestions welcomed. Thanks. Edited October 18, 2013 by Eyefor Quote Link to comment Share on other sites More sharing options...
Eyefor Posted October 18, 2013 Author Report Share Posted October 18, 2013 Sorted. Thanks. Wrong bulb which had the filament in line with the lamp beam. Just fitted a new Osram one (filament sits across the lamp beam) and all is fine. Quote Link to comment Share on other sites More sharing options...
Frenchieboy Posted October 18, 2013 Report Share Posted October 18, 2013 Sorted. Thanks. Wrong bulb which had the filament in line with the lamp beam. Just fitted a new Osram one (filament sits across the lamp beam) and all is fine. Just remember to try not to touch it with your fingers when you fit it! Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 18, 2013 Report Share Posted October 18, 2013 (edited) You should also notice another difference. You don't say what wattage you are using. I don't think it'll be 100 in the 140 but just as an example if this was the case, the lamp you took out chucks out 2800 lumens and the one you put in, 3600. Similarly, if its 50, then 900 out and 1600 in. These figures assume Osram. The highest output rating recommended for the 140 is a 75 watt but as far as I know they are only readily available in a vertical fitting...........the 50 watt Osram, HLX 64610 is horizontal and not so very far behind in performance anyway. Should you have found a 75 watt horizontal that is better than the figure (1600 lumens) for the 50 watt Osram, would you be so good as to post the details. Many thanks. Edited October 18, 2013 by wymberley Quote Link to comment Share on other sites More sharing options...
Eyefor Posted October 18, 2013 Author Report Share Posted October 18, 2013 (edited) You should also notice another difference. You don't say what wattage you are using. I don't think it'll be 100 in the 140 but just as an example if this was the case, the lamp you took out chucks out 2800 lumens and the one you put in, 3600. Similarly, if its 50, then 900 out and 1600 in. These figures assume Osram. The highest output rating recommended for the 140 is a 75 watt but as far as I know they are only readily available in a vertical fitting...........the 50 watt Osram, HLX 64610 is horizontal and not so very far behind in performance anyway. Should you have found a 75 watt horizontal that is better than the figure (1600 lumens) for the 50 watt Osram, would you be so good as to post the details. Many thanks. Hi, The one I've put in is 100W Osram NAED 5428 - which was a spare I had for my 170's. If the max for the 140 is 75 watt could this damage the lamp? Thanks for your help. Edited October 18, 2013 by Eyefor Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 18, 2013 Report Share Posted October 18, 2013 If you Google NAED you'll realise why the Osram Part Number is different and is HLX 64625 and is the 3600 lumens one that was mentioned. Yes it could damage the lamp, but you are now aware of the fact so just use it sensibly and keep the 'ON' time down as far as is possible and make sure nothing is getting, shall we say, 'warm'. Obviously, you'll need fuses to suit as you're now pulling more power. To err on the side of caution, the 50 watt one I mentioned earlier has a greater output than any 75 ones I've come across and hence my request. Remember medlamps.com Quote Link to comment Share on other sites More sharing options...
Eyefor Posted October 18, 2013 Author Report Share Posted October 18, 2013 If you Google NAED you'll realise why the Osram Part Number is different and is HLX 64625 and is the 3600 lumens one that was mentioned. Yes it could damage the lamp, but you are now aware of the fact so just use it sensibly and keep the 'ON' time down as far as is possible and make sure nothing is getting, shall we say, 'warm'. Obviously, you'll need fuses to suit as you're now pulling more power. To err on the side of caution, the 50 watt one I mentioned earlier has a greater output than any 75 ones I've come across and hence my request. Remember medlamps.com All noted & thanks again for your help. Very grateful. Quote Link to comment Share on other sites More sharing options...
foxy bingo Posted October 18, 2013 Report Share Posted October 18, 2013 You should also notice another difference. You don't say what wattage you are using. I don't think it'll be 100 in the 140 but just as an example if this was the case, the lamp you took out chucks out 2800 lumens and the one you put in, 3600. Similarly, if its 50, then 900 out and 1600 in. These figures assume Osram. The highest output rating recommended for the 140 is a 75 watt but as far as I know they are only readily available in a vertical fitting...........the 50 watt Osram, HLX 64610 is horizontal and not so very far behind in performance anyway. Should you have found a 75 watt horizontal that is better than the figure (1600 lumens) for the 50 watt Osram, would you be so good as to post the details. Many thanks. I knew that Quote Link to comment Share on other sites More sharing options...
activeviii Posted November 11, 2013 Report Share Posted November 11, 2013 also dont push the bulb all the way down in the holder. a 4-5mm gap i found best. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.