1   Lamps / Modern / Re: Current / voltage for T4 fluorescent tubes.  on: Today at 10:14:44 PM 
Started by RRK - Last post by RRK

But interesting, when I got a Burgess Safari lantern normally designed to run F8T5, the tube in it was somewhat thinner, my guess would be like 13 or 14mm (instead of the standard 16mm), made by GE and still labeled as F8T5. Dunno what that was about...

Seems to be a recent 'economy' trend. I have a couple of very recent (2024 vintage) Chinese Osram 11W PLs, that have visibly thinner tubes than you usually expect on 11W lamp. May be an effect of thinner glass walls, as the lamps feel very lightweight.



 
 2   Lamps / Modern / Re: Current / voltage for T4 fluorescent tubes.  on: Today at 10:10:30 PM 
Started by RRK - Last post by RRK
The tubes I have are certainly not 120mA. But mine are higher than 10W of power. 368mm end-to-end for 12W and and 470mm for 16W one.

 3   Lamps / Modern / Re: Experience with Qianshun Lighting/Glow Object ballasts?  on: Today at 10:03:51 PM 
Started by shokoshiro - Last post by RRK
Still I believe something is wrong with your magnetic ballast or meter. It certainly lists 0.62A line current with 35W lamp on the nameplate, but you show 0.759A at close to nominal 123V on your watt-meter. PFC capacitor is bad? 

 4   General / Off-Topic / Re: Anyone else here neurodivergent?  on: Today at 09:23:53 PM 
Started by Multisubject - Last post by Multisubject
@Maxim
I could write a book with all of the weird obsessions I have had, one notable one from when I was very young is if I spun around (like going up multiple flights of stairs), I would count how many times I spun and then when I was done I would spin the opposite way, as if I was unraveling an imaginary string that had wrapped around me.

I also learned to talk very late. I think I have improved sort of decently, but I am definitely very different than others in a crowd if you pay attention (this of course led to issues in school). Interesting that you like public speaking, public speaking is a total disaster for me, unless it is something I am interested in (so pretty much never). That is a skill many people would love to have.
 5   General / Off-Topic / Re: What portable fans do you use  on: Today at 05:00:29 PM 
Started by F96T12 DD VHO - Last post by Maxim
I have a battered "Wind Chaser" fan for when it gets really muggy (it makes quite a racket and vibrates excessively, especially on high), a large Air Monster, a small Air Monster, and a no-name Chinese clip fan from Walmart (bearings are starting to fail on that one, as it's run 24/7).

We had a Patton at one point, but I have absolutely no idea where it wound up. My favorite fans that I see out in the wild are those pedestal-mounted Pattons... they are beasts.
 6   General / Off-Topic / Re: Anyone else here neurodivergent?  on: Today at 04:54:44 PM 
Started by Multisubject - Last post by Maxim
I'm not formally diagnosed with anything, but I'm likely at least a little bit autistic. Also ADHD for sure. I have the same "can't focus for sh*t" vs. "hyperfocused to death" stages that people with ADHD do. Something just clicks, and my brain starts firing on all eight cylinders.

Also mild OCD is probable, I've always had an obsession of adding values to numbers to get an even value, ie, 10,000. I remember i would stare out the car window and do that with every mailbox number I would pass. Now, as a driver, I do it with license plate numbers when stopped at a red light or in standstill traffic. Also, I used to have an odd obsession where if I tapped two fingers together, I would have to tap every finger twice– up from the pink to the thumb and down again. Weird, I know.  ;D

Finally... if that wasn't enough, i learned to talk very late. But once I learned, you couldn't shut me up if you tried. And social settings have always been difficult (i couldn't read the room in my younger years), though now that I've spent years working on that I've vastly improved. Weirdly enough, I've always loved public speaking...  :eoled: :eoled:
 7   General / Off-Topic / Re: Anyone else here neurodivergent?  on: Today at 04:36:13 PM 
Started by Multisubject - Last post by Multisubject
@rjluna2
Thanks! I think I manage pretty well

@Al_M
That is sort of what I was alluding to, but I didn't want to say it outright lol
 8   General / Off-Topic / Re: Anyone else here neurodivergent?  on: Today at 04:30:05 PM 
Started by Multisubject - Last post by Al_M
Probably 99% of members on here, and those who say they aren't are most likely in denial.
 9   General / Off-Topic / Re: Anyone else here neurodivergent?  on: Today at 04:24:13 PM 
Started by Multisubject - Last post by rjluna2
You are not alone, Multisubject.  I do have mild autism and able to manage it :)
 10   Lamps / Modern / Re: Experience with Qianshun Lighting/Glow Object ballasts?  on: Today at 01:20:57 PM 
Started by shokoshiro - Last post by shokoshiro
thanks for providing the test results and technical information, @Laurens and @Medved and @RRK - very helpful in gauging the performance and efficiency of the Qianshun ballast.

so far, i am still VERY impressed with the 35W one i purchased.  :)  i ran it for 12 hours yesterday and it was just barely warm to the touch afterwards. i also had a couple of voltage sags when my air conditioner started, enough to cause all my lamps to dim or flicker for a short amount of time, and the ballast re-struck the lamp instantly as expected, no "complaints" or issues.

i'll see how it holds up over time, and i have a Qianshun 18W SOX-E ballast arriving at my home tomorrow afternoon so i am looking forward to testing that one out as well.

assuming all is well with these ballasts over time, i will in the future consider a high recommendation of these ballasts to those of us looking for new, efficient gear to keep our SOX lamps running happily.

BTW - the magnetic ballast i have been comparing against is an Advance 71A0490 (photo attached). i have 5 of them and have been swapping between them for control purposes - all behave pretty much identically as they all have the same date code and were in more-or-less daily service at my workplace for the same amount of time (about 12 years). i've replaced the 14uF capacitors on 2 of them to bring them back within spec; the other 3 are doing fine. this ballast choice could explain why mine have higher losses - they're dual-purpose ballasts that can also run 55W lamps, so i imagine some compromises in efficiency were made to allow them to run both lamps.
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