Miniature Lamp Question

Discussion in 'Landscape Lighting' started by INTEGRA Bespoke Lighting, Feb 4, 2010.


What type of miniature lamp do you most prefer / use most often

  1. Single Contact Bayonet (SCB)

    0 vote(s)
  2. Bi-Pin

  3. T5 Wedge

  1. INTEGRA Bespoke Lighting

    INTEGRA Bespoke Lighting LawnSite Platinum Member
    Posts: 4,102

    Ok guys I would like to know what miniature lamp style is most popular with you all.

    I know you wont all take the time to answer the poll, but I hope you will take a moment to tell me what lamp/socket type you use most. If you are a manufacturer or distributor, please let me know which lamp/socket type you sell most of.

    The primary choices that I see on the market are the Bi-Pin (be it G4 or G5.3), Single Contact Bayonet (SCB) and T5 Wedge. There are others of course, the DCB, T3 wedge, and that large wedge that Kichler uses (S8?)

    Kind regards and much obliged.
  2. INTEGRA Bespoke Lighting

    INTEGRA Bespoke Lighting LawnSite Platinum Member
    Posts: 4,102

    I actually prefer the T5 Wedge for a number of reasons, most of them to do with socket quality, contact area, and harsh environments.

    I do find more bi-pin sockets installed in fixtures than anything else, but the sockets themselves have proven to be really problematic over time. Small contact area between pin and paddles, poor construction, etc have played havoc with these for me. The best Bi-Pin Socket I have ever seen is the one that Hunza uses and it is my go-to socket when it comes time to replace everybody else's at failure time. (I would love to find the direct source of these someday!)

    I find that the T5 Wedge allows for a much more secure fit between lamp and socket and offers much more contact area between the lamp leads and the socket. There are now more long life (xenon) T5 Wedge choices on the market than there are Bi-Pin lamps too, providing for more accurate control over light levels.

    The SCB is not too bad, as long as you use a full SS socket. The cheapo sockets that many manufacturers have used over the years break down with heat and age and cause a royal PITA to change the lamp over time. Hadco seems to have the best SCB socket that I have come across.
  3. Alan B

    Alan B Sponsor
    Posts: 431


    We sell mainly bi pins and I prefer them to wedges for a few reasons:
    -the lamp quality seems to be better with bi pins (the glass surrounding the metal conductor pins on bi pins is thicker, better sealed, more durable). I never liked how wedges were made -- fold-able contact wires seem to encounter more problems from my experience--especially if you remove the wedge lamp--wire get bend and break.
    -sockets. The bi pin sockets are made with ceramic high temp insulators and metal and are solid and compact. All the wedge sockets I have encountered have plastic bodies holding the contacts and are a little more bulky. Also I find it easier to set and insure a bi pin lamp into a socket compared to a wedge.

    -I do agree with you about the increased contact area of a wedge socket, however the pins on the wedge lamp seem to be smaller, thinner, weaker, more fragile.
    -lastly more universal. The same bi pin socket can often hold a great variety of lamp types and wattage's. A spring system bi pin socket can take a G4 20w, a G6 35w or even an MR16 lamp (if a good socket like Casts spring loaded contacts, do so without "stretching" the contacts and making them loose after a larger pin is used).
    -down side of bi pin for LEDs is getting a 360 degree illumination. I would love to see an LED that works for a bi pin that has 360 illumination instead of the LED panel aimed in only 1 direction, also one that is properly heat sinked and has greater lumen outputs.

    -Just my 2 cents. May be different than others.


  4. INTEGRA Bespoke Lighting

    INTEGRA Bespoke Lighting LawnSite Platinum Member
    Posts: 4,102

    Thanks for the input Alan. Its unfortunate that more manufacturers do not spend a few extra cents on a top quality bi-pin sockets. Most are those ubiquitous foil covered type where the springs "stretch" after a couple of lamp insertions.

    BJB make a pretty decent Bi-Pin Socket (Auroralight uses these) and The Hunza Bi-Pin is the best I have ever used. (as previously noted).

    No worries on the omni-directional bi-pin LED lamp... I am in development of one that will have about 150 Lumens output at 2800K with a CRI in the high 70's to low 80's. The issue with this format has been properly heat sinking such a high brightness, miniature lamp. We have come up with a VERY new and novel solution to this!
  5. Alan B

    Alan B Sponsor
    Posts: 431

    exc..wouls love to see it... it's really needed. Mr16's are used in lots of lighting application (indoors forexample) so innovation is happening with mr16's. However this application is being left behind because of its more niche use. It will be great if you or someone comes up with a solution so we can use them in path, area wallwashes etc.


  6. maxwilbryan

    maxwilbryan LawnSite Member
    Posts: 78
    tanek posted pics on the AOLP thread (images1133-1140) or 360 led-wedge&bi-pin.
    So just bi-pins here. Only use FX Luminaire as of now. Trying to learn more about the infinate fixtures, sockets, bulbs, wiring systems, dimmers, yada... So I pretty mich google every term I don't understand. That's where I go the above URL. It may not be what y'all are talkin about.
    Posted via Mobile Device
  7. INTEGRA Bespoke Lighting

    INTEGRA Bespoke Lighting LawnSite Platinum Member
    Posts: 4,102

    The market is filled with these types of lamps and none of them are appropriate at all.

    1- they are all 12VDC for the auto/marine/rv market. Not for use on AC systems.
    2- they produce nowhere near enough light for general illumination applications. We need up and above 150 Lumens to be effective and that light must fall in a narrow CCT band of 2700K to 3000K to be acceptable. These lamps would be lucky to produce 1/3 of that light and have absolutely no control over CCT.
    3- Even if you were to load up this type of lamp with smd led chips there is nowhere for the heat to go.

    Trust me, we are working on this and I am quite certain will produce what the market is looking for. I am on my third rendition of heat sinks for this style of lamp now and we think we might have the situation under control.

    Do not be swayed by false claims! The claims being made by LED lamp re-sellers are amazing and mystifying. Ask for full photometrics and spectroanalysis before you buy and see if that information is forthcoming. If not, dont believe the hype.
  8. INTEGRA Bespoke Lighting

    INTEGRA Bespoke Lighting LawnSite Platinum Member
    Posts: 4,102

    Wow guys, 79 Views and only two unique responses?! You can do better Im sure.

  9. maxwilbryan

    maxwilbryan LawnSite Member
    Posts: 78

    I'm watching cartoons on YouTube about basic electricity. Im a little scared to look at a spectroanalysis at this point. Sounds like it has fangs. I believe you of you say they ain't no count.
    Posted via Mobile Device
  10. S&MLL

    S&MLL LawnSite Senior Member
    Posts: 751

    I like the s8. Problem is Kichler is using there own leds. Doesn’t do you much good. I think cast uses them in there paths.... could be wrong.

    But if you were to make one I would buy them. Have a bunch of older Kichler paths I would like to retrofit.

    You already have a bi pin out??? why a new one

    I think your best bet is the t5. I run into so many of them at other guys jobs and hate them. I mean HATE them. Half are so gone and old that they break in your fingers. Always burn out to fast. And If you made one that can run from 9-13 volts it would be perfect for a quick fix on a crappy install.

    Alot easier to put in a led then to rewire a system due to horrible install with drastic vd.

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