G5 T5 and G13 T8 Tube Lamp Holders & Adapters

G5 T5 and G13 T8 Tube Lamp Holders and Adapters

This collection covers G5/T5 and G13/T8 linear-tube lamp holders, T5-to-T8 conversion end caps, and one G10Q circular-lamp socket. The inspected catalog does not contain a verified PGZ18 halogen holder, so PGZ18 claims are excluded from this guide.

Products in This Collection

• G5 holders for T5 tubes: screw-bracket or buckle-mount options, including one-way and selected two-way variants
• G13 holders for T8 tubes: screw-bracket or buckle-mount options, including one-way and selected two-way variants
• T5/T8 adapters: selected G13-to-G5 and G5-to-G13 conversion options
• Fluorescent conversion end caps: paired adapters for installing specified T5 fluorescent tubes in a T8 fixture format
• G10Q socket: a separate four-pin holder for compatible circular lamps
• Mixed adapter listing: one product contains many unrelated lamp-base variants; only its T5/T8 selections belong to this range

G5/T5 vs. G13/T8

G5 and G13 identify different two-pin lamp interfaces. G5 is associated with many T5 linear tubes, while G13 is associated with many T8 linear tubes. They differ in pin spacing, holder geometry and typical tube format, so they are not directly interchangeable.

T5 and T8 names alone do not establish tube length, wattage, ballast type, LED wiring, shunted or non-shunted contacts, or fixture compatibility. Match the complete lamp and fixture specification.

Holder Formats

The catalog includes screw-bracket and buckle-mount holders, plus one-way and selected two-way variants. These terms describe the listed product format; they do not prove identical panel cutouts, wiring layouts, sealing systems or mounting dimensions. Compare the selected variant’s drawings and installation method.

T5-to-T8 Conversion End Caps

Two listings provide paired G13-to-G5 end-cap adapters for specific traditional T5 fluorescent tubes. Their variants distinguish shorter and longer formats described for 14W and 28W T5 fluorescent tubes. Those products explicitly state that they are for fluorescent lamps, not LED tubes.

A mechanical adapter does not automatically make the lamp electrically compatible with the fixture. Ballast type, lamp current, tube length, wiring and control gear must all match.

Mixed T5/T8 Adapter Listing

One two-piece mixed listing includes T5-to-T8 and T8-to-T5 selections alongside E-series, bayonet, GU, G24 and GX adapters. Choose only the exact variant required. Conversion direction matters: T5-to-T8 is not the same as T8-to-T5.

G10Q Is a Separate Interface

The G10Q product is a four-pin socket for compatible circular lamps. It is not a G5 or G13 holder, and T5/T8 wording in its product title does not establish compatibility with standard two-pin linear tubes. Verify pin layout, lamp diameter, ballast and wiring.

How to Select

1. Identify the lamp base: G5, G13 or G10Q.
2. Confirm linear or circular lamp format.
3. Check fluorescent versus LED technology.
4. For adapters, confirm conversion direction.
5. Match tube length, wattage and ballast or driver requirements.
6. Verify one-way or two-way contact arrangement.
7. Compare mounting style, panel thickness, cutout and dimensions.
8. Check the exact variant’s voltage, current, temperature, ingress-protection and certification evidence.
9. Confirm package quantity; listings range from pairs to bulk packs.

Electrical and Retrofit Boundaries

A holder or passive end-cap adapter does not convert supply voltage, frequency, ballast output, LED driver requirements or wiring topology. Do not assume suitability for ballast-bypass LED tubes. Shunted and non-shunted holders can require different circuits, so follow the exact lamp and fixture wiring instructions.

Waterproof and Dustproof Claims

Selected G5/G13 products are marketed as waterproof or dustproof, and one listing states IP54. These claims are product-specific. Final ingress protection depends on the complete fixture, seals, mounting surface, cable entry and installation; the collection as a whole has no verified IP rating.

Ratings, Materials and Certifications

Individual listings cite different values such as 250V or 500V, 2A, 80–140°C, PC housings, bronze or copper contacts, and CE, RoHS, CCC, CQC or LVD references. These are inconsistent and cannot be applied across the collection. No collection-wide voltage, current, temperature, material, fire rating, IP rating or certification is claimed.

Misclassified Product

One active product in this collection is a 382/392 series slow-blow PCB fuse assortment. It is not a lamp holder or tube adapter and should not be used when selecting lighting components.

Frequently Asked Questions

Are G5 and G13 interchangeable?
No. They use different pin spacing and holder geometry.

Can every T5-to-T8 adapter be used with LED tubes?
No. Two conversion products explicitly specify fluorescent tubes and exclude LED tubes.

Does a tube adapter replace the ballast?
No. A passive adapter does not convert or replace control gear.

Are all holders waterproof?
No. Waterproof, dustproof and IP54 wording appears only on selected listings and depends on the finished installation.

Is G10Q another T5 or T8 base?
No. It is a separate four-pin circular-lamp interface.

Does this collection include PGZ18 halogen holders?
No verified PGZ18 product was found among the seven inspected products.

Ordering Checklist

Confirm base code, tube shape, lamp technology, length, wattage, ballast or driver, contact arrangement, adapter direction, mounting dimensions, environmental sealing, package quantity and product-specific compliance evidence.