Questions tagged [halogen]
33 questions
39
votes
3 answers
Why does this LED bulb have an energy efficiency rating of 'F'?
In my home, I have some halogen spot lights, which have an energy efficiency rating of 'C':
I would like to replace them with more efficient LED bulbs, but looking on the Philips website, they claim their bulbs are rated 'F'!
LEDspot VLE GU5.3 MR16…
Rocketmagnet
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Dimmer for 2 halogen headlights
I have two halogen automobile headlights (12v, 65 watt) that I’m using to make a wall hanging. I want to be able to dim the lights with a dimmer that I can have on a side table. I have a transformer to go from wall outlet to 12v, but what type of…
Chris
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LED lamps with halogen dimmer
I've got halogen spot bulbs, with GU10 connector, throughout my living room. All connected to one halogen dimmer. I'd like to replace them with LED spots, using the same fixtures as the halogen spots.
This made me wonder. There are LED spots that…
Forage
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1 answer
How to dim a 12V AC halogen
I have a couple of lamps, halogen I think. I bought them decades ago. When new they had a nice dimmer knob that led down to a transformer and I could dim the lights or, more usually, turn them off and on with the dimmer.
The transformer in both died…
RogerParkinson
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What is the off-white powdery material found at the base of GU5.3 light bulbs?
I've noticed most GU5.3 light bulbs, both halogen and LED, contain a granular material at the base.
There seems to be considerable variation in how much of this powder is present, even within the same brand and type of lamp. Sometimes, the base is…
Brybeck
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2
votes
1 answer
Power supply fails when PWM an halogen lamp
In this video I'm trying to light a 50W 12V halogen lamp using PWM, and switching from 0/500 to 500/500 duty cycle within 15 seconds (31000Hz frequency). I'm using an ATX power supply (276W spec on 12V rail), a MOSFET (IRF540N, "33A 100V 0.040 Ohm…
Juan Manuel López Manzano
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1 answer
Why so different lumen efficiencies between mains and 22V halogen?
I was looking for data about halogen reflectors I just bought. They are 50W, 230V.
On the package I read 320 lumen and that looked ridiculous to me, then I found this document by GE: Halogen Lamps Spectrum Catalog.
It states on page 100 that MR16…
FarO
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5 mm 12 V 5 W filament lamp
Please help to identify small filament lamp, size about 5 mm. Voltage specified as 12 V. It was mounted on the IR source.
There is a little vertical metal spring (not filament, another one) inside glass body, it was broken during demounting, you can…
Andy
- 11
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1
vote
1 answer
Mini reflow oven advice
Hey all I am venturing into making a DIY reflow oven. Been looking at many different types/styles over the last couple of years and feel now is a good time to start one.
I originally planned on building this type of toaster oven. Looked nice with a…
StealthRT
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3 answers
Why do high current wires have fabric/nyon sheathes?
I saw two wires going into a halogen light bulb whose outer sheathes were not a plastic (like PVC, or polyurethane), but rather a woven fabric (like a nylon shoelace). Why is woven fabric better for this high current application? Sure, PVC may not…
PJazz
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1 answer
Low-power halogen lamp dimmer
I want to connect a set of low power halogen lamps to a dimmer. This would be used to illuminate plants who are then monitored using a hyperspectral camera.
I was wondering whether any spurious switching behaviour of the dimmer and transformer will…
opieters
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1
vote
2 answers
Changing 12 V halogen lighting to 12 V LEDs
I have an old project that is causing the client current problems. Installed was 12 V halogen lighting 10 W bulbs, G4 base, multiple lights, buried cabling, multiple transformers from 120 V to 12 V.
Client is interested in swapping to LEDs and I…
kevinbaja
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1
vote
2 answers
Is there a safety issue with halogen bulbs if the outer glass envelope comes off leaving exposed wires
If the bulb fails and outer glass envelope becomes detached is there a safety issue with the inner exposed wires between the small inner bulb and the bayonet cap?
flash
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2 answers
Infrared LED vs halogen light output comparison
I am thinking of using a high power ~50W IR led. I am wondering if LED IR is more efficient than halogen as is the case with visible light LED's? I couldn't find the light output of either IR halogen or LED so I can't compare products per watt.
I…
DominicM
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LED fuel indicator instead of halogen
I have this problem which is driving me crazy: I want a LED light to indicate when my motorbike is running on emergency fueltank. The system works with a normal halogen bulb, and the system is generating 13,5V whenever is runs on the emergency tank.…
