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27 votes
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Why does my halogen T-4 desk lamp not light up the bulb completely?

The bulbs in the link say 120 Volt. Your lamp says use 12V 50W. I think you just got the wrong bulbs.
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  • 689
25 votes
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What outdoor lightbulb is this?

There is probably a spring loaded contact on one end. Try moving the bulb gently both ways and see if moves. If so, move it far enough to remove it via one of the slots on either end of the bulb ...
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14 votes

What outdoor lightbulb is this?

The socket is called R7s. These halogen light bulbs have lengths of 78 mm, 118 mm, 189 mm or 254 mm. From the picture it seems to be an 118 mm, which is most common. (Measure or read the imprint) You ...
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7 votes

How do I change the bulbs in this light fixture?

Looks like a GU10 bulb. You can usually remove it by lightly pressing the bulb itself and twisting it anti-clockwise.
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5 votes

Two-way or two-strength LED bulbs

The high and low settings of the lights on your range hood are most likely not controlled by standard semiconductor triac dimming technology. Such technology is typically used where continuously ...
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  • 61.3k
4 votes

Can I replace tungsten-halogen lamps with an LED version?

These types of lights range in voltage from 6V to 120V depending on the fixture. The voltage & wattage should be stamped on the glass. These lamps usually create a large amount of heat if you ...
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  • 95.8k
3 votes

recessed light only works with halogen bulb?

It may be a dimensional issue. Incandescent/halogen typically have a long narrow stem. CFLs put a pudgy power converter module right at the bottom. Some LEDs unnecessarily do the same since CFLs do....
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3 votes

Replacing G4 halogen bulbs with LEDs

You probably need to replace the power supply with one designed for LEDs. According to various web sites, some LEDs have compatibility issues with transformers designed for halogens. In particular, ...
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  • 372
3 votes

Sparks from desk lamp?

Lamps below the low contact voltage are not uncommon. I have installed many “fancy” systems that the conductors are not insulated and the lamp holders clip on to the wires . Some fixtures have fancy ...
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  • 95.8k
3 votes

Why does my halogen T-4 desk lamp not light up the bulb completely?

The answer by izzy most likely describes the problem. If for some reason the newest bulbs don't function, you should: Check the transformer at the base of the lamp. You'll need a voltage meter to ...
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  • 10.8k
3 votes

How do I change the bulbs in this light fixture?

Either - a bayonet fitting - push up a little, turn anti-clockwise 90 degrees, with a protected hand, or- a screw fitting, again, slight push up, and unscrew anti-clockwise for several turns. best to ...
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  • 2,680
3 votes

How do I change the bulbs in this light fixture?

It may be possible to pull out the entire fixture by pulling the outer metal ring downwards, maybe by inserting some plastic tool or card between the parts. This looks a little non-standard to me due ...
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  • 239
3 votes

What outdoor lightbulb is this?

It is the older type of halogen fitting, with a spring loaded pin at each end. Despite a comment, it's usually fitted outdoors - it's often a high wattage, and will get hot, so outdoors is sensible. ...
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  • 2,680
2 votes

LED light bulbs turn off immediately after being switched on

This question is old, but it just hit 1000 views so I thought I'd post the answer. The 12V PSUs were all at end of life, and were failing. It may have been that the 3.5W bulbs were too low power to ...
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  • 187
2 votes

Using LED light bulbs in a dimmer

Many dimmers need a minimum wattage load to function. Four of the LEDs is 29.2W and is probably too low for the dimmer. The single remaining halogen alone is 39W (I assume it worked with the dimmer ...
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  • 7,862
2 votes

Molten wire nuts on recessed MR16 halogen lights

Thanks to Tester101's comment on my question I learned about ceramic high temperature wire nuts. I ended up using these: http://www.amazon.com/dp/B0071NCSA4, for 18-14 gauge wire (the ones noted in my ...
2 votes
Accepted

Halogen transformer replacement: safe to use 60w max to replace a 75w max?

Depends. What load is on the downstream side? If there's only one 50W bulb, you should be fine. Two 35Ws? Need a bigger one.
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2 votes

How to wire a 220V to 12V transformer

Unscrew the cover and you'll see 2 sets of connectors/terminals. One set for primary, one set for secondary. Connect 230V to terminals marked as primary (at the top of the picture), and the second set ...
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2 votes

recessed light only works with halogen bulb?

You have in that fixture a PAR38 halogen bulb that is working. It is a larger bulb than the PAR30. Both of these types use the same Socket Style and so can be interchanged as long as the lamp fits - ...
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  • 5,210
2 votes

Can I replace tungsten-halogen lamps with an LED version?

You should be able to find LED replacements that use the right socket (from your picture I'd guess it's a G4 socket) and voltage. The main point of LED lamps is that they require less electrical ...
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  • 253
2 votes
Accepted

What does it mean for a halogen globe to strobe and then blow?

I have seen halogen strobe prior to totally failing, I have found 2 causes one was the lamp element itself that was bouncing around causing the flickering then failure, the other failures I have found ...
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  • 95.8k
2 votes

Can I replace a Maximum Bulb Wattage (Watts) 25 halogen light bulb with 5w LED light bulb? Is it safe?

When choosing lamps, as long as the actual wattage is below the rating of the fixture, you're safe. It doesn't matter that the fixture generates a lot of light with the watts it consumes. The ...
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2 votes

Is it possible to drive led strips using a halogen driver?

Your power supply doesn't like the LEDs. That's not a surprise. Either because there isn't enough current flowing (the halogen acted as a dummy resistor to create some load), in which case more ...
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2 votes

Halogen Light Fixture with Broken prong

It is NOT safe since as indicated in the question only one prong of the bulb is in its socket contact. Obviously the other one that you left out is merely touching the other broken off prong. ...
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  • 61.3k
2 votes

Replace Halogen spot light

if a GU16 bulb, then you have to push -in- and turn. This is due to the little 'nubs' on the end of the connectors
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  • 5,551
1 vote

Switching bulbs? PAR20 halogen to PAR20 LED, is this a problem?

Yes, you definitely should if you are able to line up an LED light and dimmer that play well together. Incandescent is like neon: There is no earthly reason to invest in it for anything, unless you ...
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1 vote

Any trick to removing GU10 lightbulbs?

Yes, there's suction cups made just for that. They stick to the front glass and let you turn the bulb. Just google for "gu10 suction cups".
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  • 1,403
1 vote

Can you use an LED Bayonet bulb in standard 40 or 60W bayonet fitting?

I've not dealt with these myself (but you made me curious): a simple search for B22d LEDs turns up plenty of results; e.g. these Osram's on Amazon. You haven't said what mount these "Bayonet fitting" ...
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