Ushio lamps don’t fit

I'm having the exact same issue right now. Was wanting to post my issue & was not expecting to find an exist thread of the same issue.

I had contacted ETC tech support evening of 2/20/24 & the person was not able to help me out. I followed up by calling Full compass for replace bulbs. 

I'm working on replacing lamps on existing 750 Source 4's and I had ordered replacement bulbs (24 total) - Ushio HPLWX 750W/115V #1003153. The first 2 Lamps I tried from the 1st box of 10 bulbs. They stopped short of bottoming out with the fixture by about a 1/4 inch & would not go any further & there was no way I would be able to engage the retaining Clips. I tried a number of times to make them work with no success. I tried the same 2 bulbs on a second fixture with the same results. Thinking the second box of 10 lamps could be a different patch. The first one I tried & it snapped right in to one of the fixture I was have the issue with the first 2 bulbs. I had purchased the Lamps thru Full Compass & they're going to replace the 1st box of ten. Which I stopped using. 

Now I did continue with the second box of lamps & the remaining 4 lamps left and not all of them were fitting in as well. I got to the point where I gave up on making sure the retaining clips were latched.   The bulbs were in enough for the light to function & very hard to get back out I just left the retaining Clip tucked under the lamp housing. 

our PAC opened in 2018 & on 1 of the original Bulbs in one of the fixtures I was replacing it had been install the same way because the lamp would not seat fully so the retaining clips were under the bulb housing. This bulb was a 575W Osram lamp. 

Out of the 14 lamps I replaced I would say only 1/3 of them snapped in like I would expect them too. Another 1/3 I had to work hard to get the retaining clip to engage in place because the lamp was close to being seated but not fully. The remaining 1/3 the retaining clips ended up tucked under the bulb housing. 

I've worked for a Jet engine company in the engineering department for 38 years & this is clearly a quality issue. The Bulbs do have a quality issue because some bulbs would go into a fixture when another bulb would not. But it could also be a combination of the quality of the fixture & the Bulbs together. 

ETC should take a serious look into this.  

Jeff - SPAC Sanford, ME

I'm having the exact same issue right now. Was wanting to post my issue & was not expecting to find an exist thread of the same issue.

I had contacted ETC tech support evening of 2/20/24 & the person was not able to help me out. I followed up by calling Full compass for replace bulbs. 

I'm working on replacing lamps on existing 750 Source 4's and I had ordered replacement bulbs (24 total) - Ushio HPLWX 750W/115V #1003153. The first 2 Lamps I tried from the 1st box of 10 bulbs. They stopped short of bottoming out with the fixture by about a 1/4 inch & would not go any further & there was no way I would be able to engage the retaining Clips. I tried a number of times to make them work with no success. I tried the same 2 bulbs on a second fixture with the same results. Thinking the second box of 10 lamps could be a different patch. The first one I tried & it snapped right in to one of the fixture I was have the issue with the first 2 bulbs. I had purchased the Lamps thru Full Compass & they're going to replace the 1st box of ten. Which I stopped using. 

Now I did continue with the second box of lamps & the remaining 4 lamps left and not all of them were fitting in as well. I got to the point where I gave up on making sure the retaining clips were latched.   The bulbs were in enough for the light to function & very hard to get back out I just left the retaining Clip tucked under the lamp housing. 

our PAC opened in 2018 & on 1 of the original Bulbs in one of the fixtures I was replacing it had been install the same way because the lamp would not seat fully so the retaining clips were under the bulb housing. This bulb was a 575W Osram lamp. 

Out of the 14 lamps I replaced I would say only 1/3 of them snapped in like I would expect them too. Another 1/3 I had to work hard to get the retaining clip to engage in place because the lamp was close to being seated but not fully. The remaining 1/3 the retaining clips ended up tucked under the bulb housing. 

I've worked for a Jet engine company in the engineering department for 38 years & this is clearly a quality issue. The Bulbs do have a quality issue because some bulbs would go into a fixture when another bulb would not. But it could also be a combination of the quality of the fixture & the Bulbs together. 

ETC should take a serious look into this.  

Jeff - SPAC Sanford, ME