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What is bypass ballast?

7 min read

Asked by: Luis Schmidt

A ballast bypass is when you remove a ballast from the electrical circuit that goes to your light fixture.

Why would you bypass a ballast?

Additionally, because ballasts eventually fail over time, removing and bypassing the ballast when installing your new lights guarantees a longer lifespan, since direct-wiring LEDs is significantly more energy-efficient.

What happens if you bypass a ballast?

The most significant negative to a ballast-bypass linear LED is the risk of electric shock since the sockets carry line voltage. It’s a common practice to place a finger on the lamp pins while you are trying to install it, and this becomes a risky endeavor when using single-ended ballast-bypass lamps .

Should I bypass ballast for LED lights?

Since LED lights work on low DC voltage, they need a driver. Most T8 LED tubes do not need a ballast. So, if you are going to install a T8 LED tube light, it will require a ballast bypass unless you choose a ballast compatible T8 LED tube.

Can I bypass the ballast for plug and play LED lights?

Plug and Play ballast bypass operated LED T8 and T5 lamps make upgrading to LED easy. Using the UL Type A plug and play LED lamps, users can replace existing T8 or T5 fluorescent lamps with without rewiring because the lamp uses the existing electronics.

What happens if you don’t bypass the ballast for LED lights?

Since fluorescent bulbs cannot regulate current on their own, without a ballast, the bulbs can draw too much power and burn out. In addition to significantly shortening the lifespan of the bulb, this can create a safety hazard.

Will a fluorescent light work without a ballast?

All fluorescent bulbs require a ballast. All compact fluorescent (CFL) bulbs require a ballast, which is often integrated. All HID bulbs require a ballast, which is sometimes integrated. No LED bulbs require a ballast, although some are engineered to work with an existing ballast.

Can LED tube work without ballast?

Hybrid LED tubes will work with or without a ballast. Hybrids are commonly installed in fixtures with ballasts, operating as plug and play LEDs until the ballast’s lifespan has ended.

Can you mix LED and fluorescent tubes?

LED and fluorescent lights on the same circuit? Some things were never meant to work together. If you intend to upgrade some lights to LED, ensure that there are no old technology lights remaining on the same circuit. LED drivers contain electronics that may be upset by old technology transformers on the same circuit.

Can I put LED bulbs in a fluorescent fixture?

You have fluorescent tube lights in your home or business already, and you’re wondering if you can pop LED tubes in these fixtures or if you’ll need to change out the fixtures for something designed for LED. Good news! You can use LED tubes in your existing fixtures!

Is ballast bypass safe?

Safety risk



The most significant negative to a ballast-bypass linear LED is the risk of electric shock since the sockets carry line voltage. It’s a common practice to place a finger on the lamp pins while you are trying to install it, and this becomes a risky endeavor when using single-ended ballast-bypass lamps .

How do I convert a fluorescent light fixture to LED?

One pin is for the hot and the other pin is for the neutral double-ended LED tubes get wiring at both ends one in four hot the other end for neutral. So why choose one over the other.

What is a self ballasted LED bulb?

The term “self-ballasted” simply means that the bulb doesn’t require a ballast to manage the electricity flow. Self-ballasted CFL lightbulbs are self-contained and can be screwed in like traditional incandescent bulbs. Simple and convenient, self-ballasted CFLs are the new go-to for standard lighting requirements.

Can you use a T8 LED bulb without a ballast?

Most T8 LED bulbs do not need a ballast. The only type of LED tube that requires a ballast is plug-and-play. Used as direct replacements for fluorescent tubes, plug-and-play LED tube lights install without fixture rewiring, and operate off the existing fluorescent ballast.

How do I know if a ballast is compatible?

You can determine whether you have a compatible fixture in seconds. Simply turn the light on, then take a photo of the fixture using your smartphone or digital camera. If there are no dark bands on the resulting image, you have an electronic ballast that will work with direct drop-in LED tubes.

What is the disadvantage of LED light?

Perhaps the biggest drawback of LED light bulbs is that they emit more blue light than incandescent bulbs, which are more on the red end of the spectrum. Blue light can cause a disruption in your circadian rhythm, negatively affect your ability to fall asleep and the quality of your sleep.

When should you not use LED lights?

Avoid LED lights above 3000K and/or labeled “bright white,” “neutral white,” “cool white,” or “daylight white” as these lights will generally have a crisp, stark white color. LEDs with this light color contain a significant amount of blue light in their spectrum. Choose a bulb with a high CRI.

What is better LED or incandescent?

LEDs use much less energy than incandescent bulbs because diode light is much more efficient, power-wise, than filament light. LED bulbs use more than 75% less energy than incandescent lighting. At low power levels, the difference is even larger.

What is the lifespan of LEDs?

One of the biggest advantages of LED light fixtures, is their extended lifespan. While incandescent light bulbs were built to last around 1,000 hours, the most enduring LED light fixtures have been tested to last as long as 100,000 hours. On average LED light bulbs will not have to be changed for at least 20 years.

Why are my LED bulbs burning out so fast?

The most common reasons for LED blowing out are high voltage, bad contacts, use of incompatible dimmer switch, or recessed lighting. Other causes include overheating due to not using the right fixtures, or simply a bad batch of lightbulbs!

Why do LED lights flicker?

What makes LED lights flicker? Well… put simply, LEDs flicker when their light output fluctuates. This fluctuation happens because your dimmable light-emitting diodes are designed to switch on and off at very high speed.

How can I increase the life of my LED bulb?

4 Ways to Extend LED Life Expectancy

  1. Control LED Lights When Not in Use. …
  2. Avoid Frequently Turning Lights On and Off. …
  3. Occupancy Sensors & Motion Light Switches. …
  4. Extend the Average Life of LED Bulbs With Timed Light Switches.


Why do LED bulbs fail?

Temperatures are too high (or too low)



When heat can’t dissipate from the heat sink, it can cause lamps to fail prematurely. Also keep the surrounding environment in mind. The hotter the room is, the earlier an LED light may degrade.

Does switching LED lights on and off shorten their life?

The operating life of a LED is unaffected by turning it on and off. While lifetime is reduced for fluorescent lamps the more often they are switched on and off, there is no negative effect on LED lifetime.

Does dimming LED extend life?

While it is true that LEDs are already very efficient compared to almost any other light source, you save even more energy by dimming them. Dimming LEDs also makes them run cooler, extending the life of the electronic components in the driver, as well as the phosphor in the LEDs.

What happens if I dim a non dimmable LED?

Simply, you can’t dim non-dimmable LED lights. If you use non-dimmable lights in a dimmer circuit, they will either flicker or just run at full brightness. They will likely burn out faster, too.

What are three types of dimmers?

Most dimmers fall into these four bulb type categories:

  • Incandescent and halogen bulbs.
  • Dimmable compact fluorescent light bulbs.
  • Magnetic Low Frequency (MLV)
  • Electronic Low Frequency (ELV)