Description
External Drive 22-Watt 4-Foot High Output Fluorescent Replacement - Glass Construction - Dimmable - Bright White
The Keystone KT-LED22T5HO-48G-850-E /G2 is a 22-watt T5 HO LED tube designed as a direct replacement for 4-foot fluorescent T5 HO lamps. It operates as a Type C lamp, meaning it requires a compatible Keystone external LED driver and bypasses the existing fluorescent ballast entirely. The tube outputs 3,400 lumens at 5000K and delivers 136 lumens per watt in a single-lamp configuration with the appropriate driver.
The glass tube measures 47.24 inches in body length with an illuminated length of 45.50 inches and a diameter of 0.63 inches. It uses a G5 base and wires single-ended or double-ended depending on the installation type. Compatible drivers include the KTLD-2LT5HO-UV-22C-VDIM /G2 for one or two lamps and the KTLD-4LT5HO-UV-22C-VDIM /G2 for three or four lamps. Both drivers accept 120 to 277V input and provide 0-10V dimming at 520mA output current. Drivers are sold separately.
Specifications
- Part Number: KT-LED22T5HO-48G-850-E /G2
- Lamp Type: T5 HO LED, Type C
- Base Type: G5
- Lamp Wattage: 22W
- System Input Power (1 lamp): 25W
- System Input Power (2 lamps): 50W
- System Input Power (3 lamps): 75W
- System Input Power (4 lamps): 100W
- Nominal Lumens (1 lamp): 3,400 lm
- Nominal Lumens (2 lamps): 6,800 lm
- Nominal Lumens (3 lamps): 10,200 lm
- Nominal Lumens (4 lamps): 13,600 lm
- Efficacy: 136 lm/W
- Color Temperature: 5000K
- CRI: Greater than 82
- Dimming: 0-10V
- Lamp Input Voltage: 36-45Vdc
- Body Length: 47.24 inches
- Illuminated Length: 45.50 inches
- Diameter: 0.63 inches
- Nominal Length: 48 inches
- Construction: Glass tube with metal end caps
- Beam Angle: 160 degrees
- Visible Light Area: 325 degrees
- Power Factor: Greater than 0.90 at full driver load
- THD: Less than 15% at full driver load
- Operating Temperature: -4F to 113F (-20C to 45C)
- Rated Life: L70 70,000 hours
- Low Optical Flicker: Confirmed
- Generation: G2
- Pack Quantity: 25
- UPC: 843654141299
Compatible Drivers (Sold Separately)
- KTLD-2LT5HO-UV-22C-VDIM /G2 - For 1 or 2 lamps, 120-277V input, 0-10V dimming, 520mA output, dimensions 9.50 x 1.33 x 1.10 inches
- KTLD-4LT5HO-UV-22C-VDIM /G2 - For 3 or 4 lamps, 120-277V input, 0-10V dimming, 520mA output, dimensions 9.60 x 1.80 x 1.30 inches
Certifications
- UL Classified Standard 1598C
- DLC Listed
- RoHS Compliant
- 10 Year Limited Warranty
Installation
This lamp requires removal of the existing fluorescent ballast. The Keystone Type C driver is hardwired into the fixture. Wiring configurations are available for single-ended and double-ended new installations as well as ballast retrofit scenarios. Refer to the manufacturer wiring diagrams for your specific configuration. Per NEC-20 410.69 2022, 0-10V negative wires have been updated from gray to pink in G2 production.
Frequently Asked Questions
Does this tube work with an existing fluorescent ballast?
No. This is a Type C LED tube. The existing fluorescent ballast must be removed and replaced with a compatible Keystone external LED driver. The tube will not operate on a fluorescent ballast.
What driver is required?
Use the KTLD-2LT5HO-UV-22C-VDIM /G2 for one or two lamps or the KTLD-4LT5HO-UV-22C-VDIM /G2 for three or four lamps. Both drivers are sold separately and accept 120 to 277V input voltage.
Can this tube be dimmed?
Yes. The lamp is 0-10V dimmable when used with a compatible Keystone 0-10V driver and a 0-10V dimming control.
Can this tube be wired single-ended or double-ended?
Yes. Keystone confirms this tube supports both single-ended and double-ended wiring. Refer to the wiring diagrams provided by Keystone for your installation type.
What is the rated life of this lamp?
Keystone rates this lamp at L70 70,000 hours.
How many lumens does this lamp produce?
In a single-lamp driver configuration, the KT-LED22T5HO-48G-850-E /G2 produces 3,400 lumens. Output scales to 6,800 lumens for two lamps, 10,200 for three, and 13,600 for four lamps.
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