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Holophane 420 This was a eBay find from a Canadian seller. It's in decent condition, however I want to clean up the corrosion inside and fill in some of the holes on the mounting plate that were drilled. I'm not entirely sure what the original mounting scheme was. The American ones had a hole intended for a 3/8" nipple but the Canadian ones don't have that. My hunch is that it was mounted to a bracket using the two upper side holes and the bottom centre hole. I saw one in the wild mounted using those holes. Unfortunately the screws for the socket are rusted and stripped so I might have to resort to drilling them out. I got the refractor off for cleaning already, I'm surprised it uses a sealed double refractor. Keywords: Lanterns

Holophane 420

This was a eBay find from a Canadian seller. It's in decent condition, however I want to clean up the corrosion inside and fill in some of the holes on the mounting plate that were drilled. I'm not entirely sure what the original mounting scheme was. The American ones had a hole intended for a 3/8" nipple but the Canadian ones don't have that. My hunch is that it was mounted to a bracket using the two upper side holes and the bottom centre hole. I saw one in the wild mounted using those holes.

Unfortunately the screws for the socket are rusted and stripped so I might have to resort to drilling them out.

I got the refractor off for cleaning already, I'm surprised it uses a sealed double refractor.

DSC01639.jpg IMG_0570.jpg edited_20250410_181445.jpg 20250125_113026.jpg DSC06220.jpg
Lamp/Fixture Information
Manufacturer:Holophane Canada
Model Reference:420
Lamp
Lamp Type:Incandescent
Base:E26 - Medium
Shape/Finish:A23
Fixture
Fixture Type:Wall Mounted
Socket Type:E26 - Medium
Electrical
Wattage:200w max
Voltage:120v
Physical/Production
Factory Location:Bramalea, ON, Canada
File information
Filename:edited_20250410_181445.jpg
Album name:347vPowerlite / Fixtures
Keywords:Lanterns
Filesize:1285 KiB
Date added:13 Apr 2025
Dimensions:3072 x 2048 pixels
Displayed:398 times
DateTime Original:2025:04:10 18:14:47
Exposure Time:1/40 sec
FNumber:f/1.8
Flash:No Flash
Focal length:5.4 mm
ISO:250
Model:SM-G781W
Software:Adobe Photoshop 21.1 (Windows)
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=749
Favourites:Add to Favourites

Comment 1 to 6 of 6
Page: 1

Ria   [Sun 13 Apr 2025 at 17:44]
Nice one, that would take a remote-ballasted 50W MV lamp quite happily I would think.
wide-lite 1000   [Mon 14 Apr 2025 at 01:57]
Yep ! I did exactly that with mine ! I took a peek inside mine today . With the refractor/door removed , there's a roughly 3/4" hole that is used for mounting . I'll get a photo when I get a chance .
347vPowerlite   [Sun 27 Apr 2025 at 16:36]
Thanks, yeah I think any of the medium based MVs (50, 75, 100w) would be a nice fit for this. 125w lamps might be a bit large.

Looking at my pictures of some of the ones in the wild, it looks like this revision used three bolts on the wall flange for mounting. Maybe I'll end up making a bracket for it.
Maxim   [Wed 08 Apr 2026 at 22:54]
I have one of these off of US eBay... I recently bought a few 39W CMH ballasts and I think one of those would fit quite nicely in here... paired with a porcelain G8.5 socket and a European-spec CDM-TC Mastercolour Elite from Philips... Very Happy
347vPowerlite   [Mon 13 Apr 2026 at 04:05]
That would be a cool conversion! I converted a Powerlite mini gumball to LED using basically the same items you described.
Sammi   [Mon 13 Apr 2026 at 20:35]
I wish you hadn't said that Sad bulb icon

Comment 1 to 6 of 6
Page: 1