11   General / General Discussion / Re: How to choose an appropriate PFC capacitor for NPF/LPF lag type ballasts?  on: Today at 12:09:48 AM 
Started by WorldwideHIDCollectorUSA - Last post by RRK
One serious thing to consider, in the real life lamp/ballast current is not exactly sinewave. So, using simple equations for linear networks in not entirely correct. Fortunately, 100% power factor correction is not needed in practice.
 12   Lanterns/Fixtures / Modern / Re: Acuity Brands releases a new series of LED roadway luminaires  on: November 29, 2023, 11:15:46 PM 
Started by LightsoftheWest - Last post by Maxim
Yep, they do look decent. Nice addition to the AEL family!
 13   Lanterns/Fixtures / Modern / Re: Acuity Brands releases a new series of LED roadway luminaires  on: November 29, 2023, 10:16:59 PM 
Started by LightsoftheWest - Last post by CreeRSW207
I saw these and they look pretty nice, they look pretty cool in black too when I saw the ones being put up in Philly.
 14   General / General Discussion / Re: PL-L Twin Tube Fluorescents  on: November 29, 2023, 09:44:35 PM 
Started by MikeT1982 - Last post by MikeT1982
Oh wow!!! Thank you, I’m suprised that 36” was the largest I’d seen in aquarium use back in the day! For some reason on fullham site the WH8 can power a pair of these but not a pair of VHO T12 48” 110w. Or at least there not listed. Only a WH7 on a single VHOT12. Sorry for adding that in here I’m just fascinated by the old aquarium lamps!
 15   General / General Discussion / Re: PL-L Twin Tube Fluorescents  on: November 29, 2023, 09:28:11 PM 
Started by MikeT1982 - Last post by WorldwideHIDCollectorUSA
You are absolutely right in knowing that the FHP105 lamps are slightly under 4 feet in length at around 1150mm long.

See here:

https://saturn.tlt.co.jp/product/servlet/getpdf/1/00005313/p//FHP105EL.pdf
 16   General / General Discussion / Re: PL-L Twin Tube Fluorescents  on: November 29, 2023, 09:21:28 PM 
Started by MikeT1982 - Last post by MikeT1982
Oh wow! I did not realize that with Japan! Or the ballasts thank you! The 96w at 36” I thought were largest but recently saw an old ad for a 48” even higher wattage but no pics would that be the larger size you speak of! Too neat, I appreciate all the info from all you guys.
 17   General / General Videos / Re: Moonlight towers  on: November 29, 2023, 08:59:56 PM 
Started by GE PM - Last post by LightsoftheWest
We had Industria Arc 80's or 90's, don't recall which. And both road and pavement were illuminated very well indeed. Which is why it was such a shock to come back to what we're now saddled with :sadbulb:  >:(
Your city appears to have Philips Lumas and Urbis Axis 2's.
 18   Lanterns/Fixtures / Vintage & Antique / Re: 1940’s 4 tube art deco fluorescent fixture  on: November 29, 2023, 07:24:19 PM 
Started by Lightning - Last post by Silverliner
These are Midwest Chandelier Co fixtures. Made in the early 1940s. You see they still got the glass in. Very rare. Most no longer have the glass.
 19   General / General Discussion / Re: How to choose an appropriate PFC capacitor for NPF/LPF lag type ballasts?  on: November 29, 2023, 06:40:50 PM 
Started by WorldwideHIDCollectorUSA - Last post by RRK


For example, what capacitor do I need to add in order to enable power factor correction on a 120V 60Hz F20T12 preheat fluorescent tube fixture that draws 380mA using a simple series choke ballast?

The problem is that you data is incomplete, you do not know the real power factor of your lamp + ballast system. You can look up it on the nameplate, measure with a watt-meter, or guess. For example, at 120V your circuit will consume 45.6W apparent power. Let's wildly guess the ballast loss is 3W and tube power is really 20W, so by energy conservation law the active power is 23W. Solving power triangle, Q=SQR(S^2-P^2), reactive power to compensate is 39.3W. So, reactive current is 0.328A and the capacitor needed at 120V 60Hz is about 7.25uF. Practical PFC capacitor value is usually a bit lower, full compensation is not achieved.
 20   General / General Videos / Re: Moonlight towers  on: November 29, 2023, 06:35:44 PM 
Started by GE PM - Last post by wide-lite 1000
@ Sammi : Even that probably wouldn't kill these super weeds ! From what I've read , the only sure way to eradicate it is to completely remove and replace ALL contaminated soil and replace with new . Even then , the article said if so much as a 1/4" scrap of root is left , the entire colony WILL return !

 @ HIDLad001 :  I agree about most streetlights being too bright . The US seems to lean towards much brighter lights than the rest of the world.  There's a 200w HPS M250R2 at the end of my street which could easily be replaced with something in the 70w range . Brighter isn't always better ! Lighting that provides better contrast makes more sense than something that's brighter just for the sake of being brighter . I'm sure the girl in the black hoodie of which I clipped with the side mirror in my van 10 or so years ago would agree with that !! Didn't even see her until she was about 15 ft from my front corner ! :P  YES , she was OK !!  I'd much rather have something that lights relatively evenly than something that's a zillion lumens of pure glare !

 @ Ria : My biggest grips with LED streetlights are the shear lack of any form of glare management in 90% of the lights I've seen . Combine that with the God awful high color temps ! Even the lower color temps can still be just as blinding when no optical control is used .
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