Ballast Bypass vs Plug-and-Play LED Tubes

Plug-and-play and ballast bypass LED tubes both replace fluorescent T8s, but they work differently. Plug-and-play (Type A) tubes keep the existing ballast and swap in like a fluorescent tube. Ballast bypass (Type B / direct wire) tubes need the ballast removed so line voltage feeds the sockets. One is faster on day one; the other removes a future failure point. Here's how to choose.

Plug-and-play (Type A): keep the ballast

Type A tubes are designed to run on a compatible fluorescent ballast. You shut off power, take out the old fluorescent tubes, put in the LED tubes, and turn the breaker back on. There is no rewiring. That makes Type A attractive when you need lights back online quickly and the ballast is still healthy.

The trade-offs matter. The ballast stays in the circuit, so it still draws some power and will eventually fail. When it does, the LED tubes go dark even if the tubes themselves are fine. Compatibility also matters: the tube has to match your ballast type (electronic vs magnetic, and the ballast's listed LED-compatible models). If your ballasts are old, noisy, or already failing, plug-and-play is usually a short-term fix.

Ballast bypass (Type B): remove the ballast

Type B tubes — also called direct-wire or ballast-bypass — take line voltage at the sockets. You remove the ballast, rewire the tombstones to the tube's diagram, install the LED tubes, and label the fixture so no one later puts a fluorescent tube back in it. Orilis double-ended LED T8 tubes are Type B (~22W / ~3,000 lm) and replace typical ~32W fluorescent T8s.

The upside is durability. After the conversion there is no ballast to fail, no ballast power loss, and one less service call later. The downside is the install: it is line-voltage work. Turn the breaker off and confirm it is off with a voltage tester before you touch any wires. If you are not comfortable with that, or the job is commercial, have a licensed electrician do it. See our guide on replacing T8 fluorescent tubes without a ballast for how bypass wiring works.

When to choose each

• Choose plug-and-play for a quick tube swap when ballasts are newer, quiet, and listed as compatible with the Type A tubes you buy.
• Choose ballast bypass when you want lower long-term maintenance, the ballasts are old or failing, or you are converting a whole shop or warehouse.
• Choose a retrofit kit when the housing is still solid but you want tubes, tombstones, and wiring parts in one package.
• Choose a new fixture when the housing is rusted, cracked, or sits in a damp, dusty, or washdown area.

The Orilis 4-pack retrofit kit

If you are going the bypass route and want the parts together, the Orilis 4-light fluorescent to LED retrofit kit includes LED tubes, wires, tombstones, and wire nuts. One kit converts either two fluorescent fixtures with two 4 ft tubes each, or one fixture with four 4 ft tubes. For a walkthrough of the conversion options, see how to convert a 4 foot fluorescent fixture to LED. Not sure whether DIY is appropriate? Read Do I need an electrician to install an LED retrofit kit?.

When the housing itself is the problem

Bypass tubes fix the ballast. They do not fix a rusted, cracked, or leaky housing. In damp Florida garages, car washes, barns, and walk-in cooler areas, a sealed fixture is often the cleaner answer. Orilis IP65 vapor tight LED fixtures come in 2 ft (~36W) and 4 ft (~72W) lengths, in 4500K or 6500K only. New fixtures still need line-voltage wiring, so the same safety rules apply.

Orilis tip: If a ballast is already failing, skip another Type A swap and convert to ballast bypass while the fixture is open.

Ready to choose?

Shop double-ended LED T8 tubes, the 4-light retrofit kit, or vapor tight fixtures at orilis.com. Questions? Email info@orilis.com or call 1-407-900-9745.