Cut Sheet

ManualsBrandsKeystone Technologies ManualsBallastsDouble-Sided LED Sign Tube, 4'

PRODUCT FEATURES

• Patent pending

• Ideal for both single-sided and double-sided signs

• 50,000+ hour lifetime

• Installs using existing sockets in the sign; all necessary wiring

can be done within ballast raceway

• 120-277V input

• Optical lens over individual LEDs for optimal light spread

within the sign

• Listed in the UL SAM Manual

• Effective 360° beam spread

• Rotatable end caps

• Double-sided design provides even lighting in signs with no hot-spotting

• Over 50% more energy efﬁciency than HO ﬂuorescent lamps

• UL Classiﬁed: LED sign retroﬁt, evaluated to UL 48 / UL 879A Standards

• No external driver or power supply needed

• Operating temperature: -20ºC/-22ºF to 55ºC/131ºF

• Optimized spacing 6” from the face and 12” on center

KT-LED21T8-48P2S-8XX-D

Page 1 of 2

PERFORMANCE SPECIFICATIONS

Catalog Number Length CRI Wattage Color Temperature Socket Type Efﬁcacy Total Lumens

Lumens

Per Side Per Foot

KT-LED21T8-48P2S-840-D 4’ >80 21W 4000K R17d 119 lm/W 2,500 1,250 312

KT-LED21T8-48P2S-865-D 4’ >80 21W 6500K R17d 124 lm/W 2,600 1,300 325

DESCRIPTION: Replacement for conventional T12HO and T8HO

ﬂuorescent lamps for sign applications

APPLICATION: Single- or double-sided outdoor signage

Keystone Technologies • 1390 Welsh Road, North Wales, PA 19454 • Phone (800) 464-2680 • www.keystonetech.com

Speciﬁcations subject to change. Last revised on 10.15.18

PHYSICAL SPECIFICATIONS

BASE TYPE: Rotatable

Overall Length (A)

Diameter

(B)

Nominal Length Min. Max.

48” 45.72” 45.91” 1.10’’

LAMP DIMENSIONS

ACCESSORIES (SOLD SEPARATELY)

Catalog Number Description

KTSP-10KV External surge protector; Input voltage 120-277V; Max. peak current: 10KV; IP65 Rated

CATALOG NUMBER BREAKDOWN

Double-

Sided

KT-LED21T8-48P2S-8XX-D

Keystone

Technologies

Direct

Drive

LED Lamp Wattage Lamp

Type

Length

800

Series

Color

Temp

Plastic

Summary of content (2 pages)

PAGE 1
Page 1 of 2 KT-LED21T8-48P2S-8XX-D DESCRIPTION: Replacement for conventional T12HO and T8HO fluorescent lamps for sign applications APPLICATION: Single- or double-sided outdoor signage PRODUCT FEATURES • Patent pending • Effective 360° beam spread • Ideal for both single-sided and double-sided signs • Rotatable end caps • 50,000+ hour lifetime • Double-sided design provides even lighting in signs with no hot-spotting • Installs using existing sockets in the sign; all necessary wiring can be done wi
PAGE 2
Page 2 of 2 KT-LED21T8-48P2S-8XX-D WIRING AND INSTALLATION For New Sign Construction: 1. Run black wire (L) to all sockets on one side of sign and white wire (N) to all sockets on other end of sign. 2. Install LED lamps into sockets. Ensure the ends marked L and N correspond with the wiring of the sockets. 3. Rotate lamps to desired direction for application. 4. Ensure all black wires are joined together. Ensure all white wires are joined together.