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  • Led bulb for t8 lights

    I just received a bunch of 3 bulb t8 fixtures the ballast are 277 volt. I want to eliminate the ballast and direct wire led bulbs.
    What’s the latest and greatest t8 replacement led bulbs for shop use?
    I need 30 or so bulbs.

  • #2
    I like Hyperikon and used them to replace all my flourescents starting a few years ago. Between residences and work, I, probably, replaced a couple of hundreds of them. No complaints so far.

    Here are the ones I use: https://www.amazon.com/gp/product/B00S5O83BG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 ,

    https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

    I used both, ballast compartible and bypass types. The former were used with ballast for a few years, but, finally, I removed ballasts in all my fixtures, so both types are used without ballasts.
    Last edited by MichaelP; 10-07-2019, 01:27 AM.
    Mike
    WI/IL border, USA

    Comment


    • #3
      Two or three years ago I replaced about 39 fluorescent bulbs in my home and shop with LEDs. Like you, I wanted the best efficiency so I also removed the ballasts. The bulbs are connected directly to the 115V that was wired to those fixtures. If you remove the ballasts, then you can use 115V LED bulbs and you will get the greatest efficiency.

      I purchased Sunco bulbs on Amazon. I was replacing T12 bulbs, but with direct wiring to 115V, I don't think the T8/T12 thing makes any difference. If the bulbs fit the fixture, they will work. T8 and T12 sockets are the same. It is only the bulb diameter that is different.

      https://www.amazon.com/s?k=sunco+lig...b_sb_ss_fb_1_6

      They were a little more expensive than the local lumber yard bulbs, but I have not had a single problem since installing them. One more thing, in many fixtures I was able to replace four bulbs with just three LEDs and the light was better. They were Win! Win! WIN!

      One thing to watch out for when direct wiring the LED bulbs: they are made with different wiring connections. Mine are powered with one wire to each end of the bulbs. But others are made to be powered with both wires to one end. You can wire the fixtures for both types, but you have to think about it first. Kind of a Hot-Neutral on one end and Neutral-Hot on the other, if you know what I mean. That would work with both types that I have seen.
      Last edited by Paul Alciatore; 10-07-2019, 03:04 AM.
      Paul A.
      SE Texas

      Make it fit.
      You can't win and there IS a penalty for trying!

      Comment


      • #4
        I also am considering changing out to LED's but am confused by LED claims. The implication is that LED somehow puts out more light. For example the LED's in Paul's note say 18W=40W fluorescent. and that 2 fluorescent tubes do the job of 1 LED tube! Now according to there spec sheet they have a 5000K daylight rating of 2200 lumens. Now the T8 5000K 32W fluorescent's that I use have 2600 lumens. So in my 4 bulb fixture I get 1600 fewer lumens with LED or 15% less light output. I certainly agree that there is less power used, but I also get less light. Unless LED's have some different light output factor that I do not understand.

        My shop is 18 x 34 and I have 10 four bulb fixtures providing 104,000 lumens, with LED's it would 88,000 Lumens. To keep the same light level I would need to about 6 additional LED bulbs. Even adding the extra bulbs I would still net a 38% power savings so it is still a good thing. If I actually could do what is claimed in the advertisement ie 2 to 1, the savings would be huge.

        Just confused

        Bob

        Maybe I just do not understand light output.

        Bob

        Comment


        • #5
          Bob,

          You're not confused, but while T8 light is omnidirectional, the LED tubes are unidirectional: they concentrate all the produced light in a much more narrow beam.

          T8 produces more light (lumens), but a lot of it gets lost/unused. Therefore the illuminance (lux=lumens per sq.meter) will not be as great as it could be if T8 were unidirectional.

          So although T8 emits more light, your shop items will be better or equally illuminated with the LED replacements.
          Last edited by MichaelP; 10-07-2019, 07:39 PM.
          Mike
          WI/IL border, USA

          Comment


          • #6
            Originally posted by Paul Alciatore View Post
            . . .T8 and T12 sockets are the same. . .
            They might be the same. T8 HO tubes, used mainly in commercial/industrial settings have a very different socket, called an R17D.

            Originally posted by MichaelP View Post
            Bob,

            You're not confused, but while T8 light is omnidirectional, the LED tubes are unidirectional: they concentrate all the produced light in a much more narrow beam.

            T8 produces more light (lumens), but a lot of it gets lost/unused. Therefore the illuminance (lux=lumens per sq.meter) will not be as great as it could be if T8 were unidirectional.

            So although T8 emits more light, your shop items will be better or equally illuminated with the LED replacements.
            Don't count on it. Nearly all T8 fixtures have reflectors and/or diffusers and most of the 360deg illumination is re-directed downward. The LED replacements use no reflector internally, and as you mentioned, the light is all directed downward thereby negating 80% of the effect of an existing reflector.

            I'm speaking from my own experience retrofitting three buildings with 120 8' lamps. If you buy the HO equivalent output in LED lamps, the energy savings drops dramatically. If the intended use is a home shop with low ceilings then it will probably work. If high-bay, you're going to end up with less light.
            Southwest Utah

            Comment


            • #7
              I recently put in LED lamps in existing old "Lights of America" shop lights. These were ones that can use the existing ballast, which is not a big one but a small E-I core plus a capacitor in the LOA lights.

              I used lamps from Menards, and the amount of light is absolutely blinding compared to the T12 originals. The lamps used are compatible with either.

              Yes, light is generally directed down, but there is enough going to the sides that areas which were previously darker are now decently lit. As I usually do, I used one 3000K and one 5000K in each fixture. That gives better balanced light IMO.

              I may try it on plant lights also. The "gro-light" equivalents are not highly rated by gardening mags, and I have always used a :cool white" and a "warm white" together in each fixture for plants. The 3000K is a bit more blue than the warm white, but may work. Plants use a good deal of the infrared from the sun, so the long wavelength light is useful and important.
              1601

              Keep eye on ball.
              Hashim Khan

              Comment


              • #8
                I used these by Rayon Led in several fixtures, direct wired, toss the ballast. I'm very satisfied with them.

                https://rayonled.com/en/indoor/led-tube/TUA.html

                Comment


                • #9
                  I replaced all the T8 bulbs in my shop with Toggled. You can get them 120-277 volts. They are certainly not "unidirectional" and light the shop better than the T8's in my opinion. They are not temperature dependent so I don't have to wait for them to warm up and produce full output in the winter. Another plus for me as a ham radio operator is they spew way less RF than the T8 electronic ballasts. Oh and they use a fraction of the electricity.

                  https://www.amazon.com/TOGGLED-E416-...%2C215&sr=8-16

                  Tom
                  Tom - Spotsylvania, VA

                  Comment


                  • #10
                    Thanks for the help so far, a bit confusion to me, I just want to make sure I get the right bulbs.
                    What do you think about this? https://www.amazon.com/Parmida-LED-E...s%2C244&sr=8-5

                    Comment


                    • #11
                      Originally posted by true temper View Post
                      Thanks for the help so far, a bit confusion to me, I just want to make sure I get the right bulbs.
                      What do you think about this? https://www.amazon.com/Parmida-LED-E...s%2C244&sr=8-5
                      They are not frosted, the output is not the best, and they will look too blue (cold). For some reason, color temperature of LEDs doesn't correspond to the color temperature of fluorescents: LEDs of the same color temperature always look much colder (bluish).
                      Mike
                      WI/IL border, USA

                      Comment


                      • #12
                        Originally posted by chipmaker4130 View Post
                        Nearly all T8 fixtures have reflectors and/or diffusers and most of the 360deg illumination is re-directed downward. The LED replacements use no reflector internally, and as you mentioned, the light is all directed downward thereby negating 80% of the effect of an existing reflector.

                        I'm speaking from my own experience retrofitting three buildings with 120 8' lamps. If you buy the HO equivalent output in LED lamps, the energy savings drops dramatically. If the intended use is a home shop with low ceilings then it will probably work. If high-bay, you're going to end up with less light.
                        Reflectors and diffusers, esp. those used with the garage light fixtures are far from being efficient. We'll inevitably lose a chunk of useful light energy due to it.

                        LED tubes do not need any reflectors, because they concentrate ALL light they produce in, roughly, a 120-degree beam. So, as long as the items are within the lighted spot (shaped as a triangular prism), they will be brightly illuminated. But as soon as you move away from the beam, it will get darker. So, when you plan your fixtures, take it into consideration. If you want even illumination in a large shop, you'll need to position the fixtures so that the beams touch or overlap each other. Or, maybe, find tubes with slightly wider beams, etc.

                        If we just replace the existing T8 with LED tubes, we'll get a different lighting pattern: instead of a relatively evenly, but moderately illuminated space, we get several brightly lit areas. Since many of us position light fixtures near machinery and other work areas, we may benefit from the more intense illumination there at the expense of the area in between. If you don't want such compromises, consider increasing the total number of fixtures.
                        Mike
                        WI/IL border, USA

                        Comment


                        • #13
                          Originally posted by MichaelP View Post
                          I like Hyperikon and used them to replace all my flourescents starting a few years ago. Between residences and work, I, probably, replaced a couple of hundreds of them. No complaints so far.

                          Here are the ones I use: https://www.amazon.com/gp/product/B00S5O83BG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 ,

                          https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

                          I used both, ballast compartible and bypass types. The former were used with ballast for a few years, but, finally, I removed ballasts in all my fixtures, so both types are used without ballasts.
                          +1 For the Hyperikon bulbs and direct wire. No buzz, no hum and snap starts even on cold, damp mornings.
                          I just need one more tool,just one!

                          Comment


                          • #14
                            Originally posted by MichaelP View Post
                            Reflectors and diffusers, esp. those used with the garage light fixtures are far from being efficient. We'll inevitably lose a chunk of useful light energy due to it.

                            LED tubes do not need any reflectors, because they concentrate ALL light they produce in, roughly, a 120-degree beam. So, as long as the items are within the lighted spot (shaped as a triangular prism), they will be brightly illuminated. But as soon as you move away from the beam, it will get darker. So, when you plan your fixtures, take it into consideration. If you want even illumination in a large shop, you'll need to position the fixtures so that the beams touch or overlap each other. Or, maybe, find tubes with slightly wider beams, etc.

                            If we just replace the existing T8 with LED tubes, we'll get a different lighting pattern: instead of a relatively evenly, but moderately illuminated space, we get several brightly lit areas. Since many of us position light fixtures near machinery and other work areas, we may benefit from the more intense illumination there at the expense of the area in between. If you don't want such compromises, consider increasing the total number of fixtures.
                            That might be the case if you buy bulbs without diffusers covering the LEDs. The Toggled lights I used have plastic tubes over the LEDS and do not leave any "dark spots" that I can see unless you look at the wall right near the ceiling where the fixture itself is blocking the light. I don't do any work near the ceiling. I have 13 fixtures in my 25 X 50 shop. The Hyperikon have diffuser tubes and might perform similar to the Toggled. I see they are about the same price. See picture below of a corner of my shop. Way better than the T8 lamps.


                            EDIT: I thought the Hyperikon had translucent tubes over then like the Toggled, but I see that is not the case. Therefore, my personal recommendation is the Toggled.

                            tmb
                            Tom

                            Last edited by flathead4; 10-09-2019, 08:11 AM.
                            Tom - Spotsylvania, VA

                            Comment


                            • #15
                              The Menards lights have no diffuser, but they actually put light in places that the old T12 bulbs did not. I use the same fixtures, so no difference there.
                              1601

                              Keep eye on ball.
                              Hashim Khan

                              Comment

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