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which one is brighter?

which one is brighter?

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Lamps on my lamp tester: Twinarc SHP-TS 70W, SIG 75W, HQL 80W, NAV-E50WE (with two starters)
All are used but some much more :-)
(My camera didn't get it to show the real brightness of the lamps)

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Light Information

Light Information

Manufacturer:Lamps: Sylvania/OSRAM; Lamp tester: me
Lamp Type:HPS,light bulb, MV

File information

File information

Download: Download this File
Album name:magslight / lamps
File Size:299 KB
Date added:Jan 14, 2018
Dimensions:1000 x 1180 pixels
Displayed:101 times
Date Time:2018:01:03 18:51:39
DateTime Original:2018:01:03 18:51:39
Exposure Bias:0 EV
Exposure Time:1/500 sec
FNumber:f 3
Flash:No Flash
Focal length:4.5 mm
White Balance:0
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Jan 14, 2018 at 03:14 PM Author: merc
Looks nice. If you want to experiment, try "M" (manual mode) on your camera upper ring and set the exposure as desired.

With high shutter speeds (like 1/500s in your case), the brightness of HID lamps at 50Hz will be different in each shot, depending on the current point on the voltage amplitude, ranging from almost dark to fully bright.

The brightness of the incandescent lamp will be almost the same every time, as the filament cools down quite slowly.
With shutter speeds 1/100, 1/50 or 1/25 sec the results of this test should be relevant.

Not a misoLEDist...

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Mainly the electrical side of things

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Jan 14, 2018 at 03:44 PM Author: sox35
Looks like an interesting test box, got any photos of its construction..?

Ria in Aberdeen
It'll be all right in the end, and if it isn't all right, it isn't the end  Smiley

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Jan 14, 2018 at 05:14 PM Author: Danny
Any pics of the twin arc SHP?
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Jan 15, 2018 at 01:32 PM Author: magslight
@merc: thanks. I need to try that out. I have the cam just bought. My old one was from 2008.
@MissRiaElaine: Yes, but none of the finished state.
@Danny: Yes. What do you want to see?
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