Fluorescent tubes power an enormous amount of American ceiling lighting — kitchens, garages, offices, laundry rooms, workshops, and commercial spaces. LED tube replacements offer 50–75% energy savings, no flicker from aging ballasts, no toxic mercury, and lifespans of 50,000+ hours versus 8,000–15,000 for fluorescents. The challenge is understanding Type A vs. Type B installation and selecting the right product for your specific fixture. This guide handles both.
T8 vs. T12: Know Your Tube Before Buying
The "T" number refers to the tube diameter in eighths of an inch:
- T12: 12/8 = 1.5 inches diameter. Older standard. Typically uses a magnetic ballast. More common in fixtures installed pre-1990.
- T8: 8/8 = 1 inch diameter. Current standard. Uses electronic ballast. More efficient than T12 even as fluorescent.
- T5: 5/8 = 0.625 inches diameter. Compact high-output format used in commercial applications, under-cabinet, and some modern residential fixtures.
Most LED tube replacements are available for T8 and T12. Confirm your tube diameter before ordering — T8 and T12 use the same G13 bi-pin base, so the wrong LED tube will fit mechanically but produce incorrect light output or compatibility issues.
Type A vs. Type B: The Critical Installation Choice
This is the most important decision in LED tube replacement:
- Type A (Plug-and-Play): Works with the existing fluorescent ballast. No electrical modification. Simple to install — just remove the fluorescent tube, insert the LED tube. The trade-off: you're now dependent on your aging ballast. When the ballast eventually fails (typical lifespan 10–20 years), you must replace the fixture or rewire to Type B. LED tubes are not compatible with all ballasts.
- Type B (Ballast Bypass / Direct Wire): The ballast is removed or bypassed, and the LED tube runs directly from line voltage (120V). More complex installation requiring rewiring, but: no ballast dependency, longer LED lifespan (heat from the ballast shortens it), better dimming compatibility, and works with any electrical fixture. The professional long-term solution.
- Type A+B (Dual Mode): Works either way — plug into existing ballast or wire directly. The most flexible option and increasingly common. Slightly higher cost, but eliminates the need to choose.
Key Specs at a Glance
| Spec | Fluorescent Replacement Recommendation |
|---|---|
| Tube size | Match your current tube: T8 (1" dia) or T12 (1.5" dia) |
| Length | 4-foot (48") is most common; 2-foot and 8-foot also available |
| Installation type | Type A+B (dual) for maximum flexibility |
| Color Temp (kitchen/garage) | 4,000K–5,000K for brightness and task accuracy |
| Color Temp (office/retail) | 3,500K–4,000K for functional neutral white |
| Lumens per tube | 2,000–2,200 lm (replaces 32W T8 fluorescent) |
| CRI | 80+ minimum; 90+ for food retail, makeup, or fine detail work |
Our Top Picks for 2026
Barrina T8 LED Tube (4000K, 2200lm, Type A) — 4-pack, Plug-in
For a fixture with a working, relatively modern electronic ballast (installed after 2000), Barrina's T8 plug-and-play is the fastest upgrade available. 2,200 lumens at 4,000K, instant-on, no flicker at 100% brightness. Compatibility list covers most major electronic ballasts. The 4-pack price is exceptional — often under $30 for 4 tubes covering an 8-foot double strip. Ideal for garages and kitchens with modern fixtures. Not recommended for fixtures with old magnetic ballasts — check ballast compatibility list on product page before purchasing.
Type: Type A (plug-in with existing ballast)
CRI: 85+ | Length: 4-foot
Hyperikon T8 LED Tube (5000K, 2200lm, Type A+B) — 6-Pack, Dual Mode
The ideal tube for most installations — Type A+B works with your existing ballast today, and can be rewired ballast-bypass (Type B) in the future when the ballast fails. 5,000K daylight at 2,200 lumens — the standard for garages, kitchens, and workshops where maximum task visibility is the priority. CRI 85 — solid for general task lighting use. UL-listed, 50,000-hour rated. The 6-pack covers a full two-car garage with a standard 4-fixture installation. Lumie's top value pick for anyone upgrading fluorescent fixture lighting in a functional space.
Type: A+B Dual Mode | CRI: 85+
6-pack total: 13,200 lm | Lifespan: 50,000 hrs
GE Ultramax T8 LED (3500K, CRI 90, Type B Ballast Bypass) — 2100lm
For office, retail, or any environment where CRI matters, the GE Ultramax T8 delivers CRI 90 at 3,500K in a professional direct-wire (Type B) configuration. 2,100 lumens — slightly below maximum, but the reduced power (15W vs. 22W) means less heat and longer lifespan in commercial use environments. CRI 90 makes this the correct choice for any space where colors are judged — food retail, clothing stores, physician offices, and professional offices where document review and skin tone accuracy matter. The professional standard for commercial fluorescent-to-LED conversions.
Type: B (Ballast Bypass — direct wire) | CRI: 90+
Length: 4-foot | Application: Office, retail, commercial