Jelight 34-0005-01, F4T5/BL, 4W, 365nm UV-A, Blacklight Tube,

is the exact OEM replacement longwave output tube for UVP / Jelight EL Series and UV Handheld Lamps. This lamp is a phosphor-coated blacklight tube manufactured in Japan, and is marked as F4T5BL.  Use this lamp for compatible UV-A inspection, fluorescence viewing, photochemical exposure, and laboratory blacklight applications where a compact G5 miniature bi-pin UV-A tube is required. It has a 365 nm-class longwave UV-A output, with a 368 nm manufacturer-specified output peak. 

Note:  It is NOT 350nm peak output as seen in most aftermarket F4T5/BL lamps.

Key Features

• Jelight / UVP replacement part: 34-0005-01
• UV-A blacklight output: 368 nm manufacturer-specified peak, commonly referenced as 365 nm class
• Compact 4W-class T5 format: suitable for small UV inspection and handheld lamp systems
• Phosphor-coated blacklight tube: designed for concentrated UV-A emission
• Useful service life: 3,000 hours average useful life per manufacturer data

Typical Applications

• UV-A fluorescence inspection
• Laboratory blacklight applications
• Photochemistry and photosensitization work
• Inspection of fluorescent materials, dyes, tracers, and markings
• Replacement tube for compatible 4W UVP / Jelight longwave UV lamps
• Insect attraction and other UV-A exposure applications where appropriate

Specifications

Compatibility Notes

Jelight 34-0005-01 is used as a 4-watt longwave UV-A replacement tube in compatible UVP / Jelight lamp systems. Before ordering, confirm the existing lamp marking, wattage, base type, and tube length. The correct replacement should match the fixture requirements for electrical rating, tube size, and G5 miniature bi-pin connection.

This lamp should not be substituted for longwave 350nm, shortwave UV-C 254nm, or midrange 302nm UV tubes. Those lamps use different UV wavelengths and must be used with different filters, housings, and safety requirements.

Important Safety Information

• This is a UV-A lamp and should not be used for general lighting.
• Use appropriate UV-rated eye and skin protection when operating UV lamps.
• Turn power off before installing, removing, or cleaning the lamp.
• Do not touch the lamp while operating or immediately after shutdown; the lamp may be hot.
• Do not drop, scratch, strike, or apply excessive force to the tube.
• This lamp contains mercury and must be recycled or disposed of in accordance with applicable regulations.

Frequently Asked Questions

Is Jelight 34-0005-01 a 365 nm or 368 nm lamp?

It is best described as a 365 nm-class UV-A blacklight replacement tube with a 368 nm manufacturer designation. UVP/Jelight replacement references list 34-0005-01 as a 4-watt 365 nm tube, while Japan factory identifies the corresponding F4T5BL lamp as 368 nm.

What base does this lamp use?

This lamp uses a G5 miniature bi-pin base.

What is the length of the F4T5/BL tube?

The specified lamp length is 134.5 mm, excluding the base pins.

Can this lamp be used for germicidal disinfection?

No. This is a longwave UV-A blacklight tube. Germicidal disinfection applications typically use shortwave UV-C lamps, most commonly around 254 nm, in properly designed and shielded equipment.

Is this the same as a blacklight blue lamp?

No. This page is for the F4T5/BL blacklight tube. Blacklight blue lamps, often marked BLB, use filter glass to reduce visible light and are not always interchangeable with standard BL blacklight tubes.

Ordering Assistance

If you are replacing a lamp in a UVP, Jelight, or other compact UV-A fixture, verify your current tube marking before ordering. For help, send us the lamp model, fixture model, or a photo of the markings on the existing tube.