Product Badge Image 1
4 Foot LED Sign Lamp, Double-Sided Illumination, Color Select, Advanced Optical Lens, Rotatable End Caps, Single or Double Ended Power, 120-277V

4 Foot LED Sign Lamp, Double-Sided Illumination, Color Select, Advanced Optical Lens, Rotatable End Caps, Single or Double Ended Power, 120-277V

ITEM: KT-LED21T8-48P2SO-8CSK-DX2
Brand: Keystone Technologies
UPC: 843654163451
Product Badge Image 1
Product Badge Image 1
$62.08 $74.50 17% Savings
/

Extra savings for bulk purchases!

×

Large Quote Request


×

Call to Order

Prefer ordering by phone? Give us a call at 888-454-4480 for prompt service!

Please give this product's item number to your sales rep:

KT-LED21T8-48P2SO-8CSK-DX2


Product Details
  • Brand: Keystone Technologies
  • Wattage: 21W
  • CCT Selectable: 4000K/5000K/6500K
  • Lumens: 2,600
  • Voltage: 120–277V
  • CRI: >80
  • 360° beam spread
  • Rotatable end caps
  • Ideal for both single-sided and double-sided signs
  • Lifespan: 50,000 Hrs.
  • Ratings: cULus Listed
  • Warranty: 5-year warranty

  • Usually ships in

    3-5 Business Days

  • QUESTIONS? Let us help!

Similar Products

25PK 4FT LED T8 Tube Light, Type A+B Double End or Single End Power, 2300 Lumens, 18W, 5000K, 120-277V

25PK 4FT LED T8 Tube Light, Type A+B Double End or Single End Power, 2300 Lumens, 18W, 5000K, 120-277V

$209.99
30PK 4FT LED T8 Tube Light, Type A+B Double End or Single End Power, Wattage and CCT Tunable, 120-277V

30PK 4FT LED T8 Tube Light, Type A+B Double End or Single End Power, Wattage and CCT Tunable, 120-277V

$245.99
4 ft. T8 LED Tube With Emergency Battery, 15W, 2,000 Lumens, CCT Selectable 3500K/4000K/5000K, 120-277V

4 ft. T8 LED Tube With Emergency Battery, 15W, 2,000 Lumens, CCT Selectable 3500K/4000K/5000K, 120-277V

$259.99
24 Pack 4 Foot LED T5, Ballast Bypass, 25 watt

24 Pack 4 Foot LED T5, Ballast Bypass, 25 watt

$299.99
24 Pk 4 Foot LED T5, Ballast Compatible, 24 watt

24 Pk 4 Foot LED T5, Ballast Compatible, 24 watt

$228.00
25Pk 17 Watt 4' T8 LED Tube, 5000K, 120-277v

25Pk 17 Watt 4' T8 LED Tube, 5000K, 120-277v

$193.99
25PK X3 13W 4' T8 LED Tube, 2800 Lumen Max, Glass Construction, CCT Selectable, Ballast Compatible & 120-277V, Single or Double Ended Wiring

25PK X3 13W 4' T8 LED Tube, 2800 Lumen Max, Glass Construction, CCT Selectable, Ballast Compatible & 120-277V, Single or Double Ended Wiring

$391.67
25PK 4 Foot LED Instant Fit T5, 28W, 3500 Lumens, 4000K or 5000K

25PK 4 Foot LED Instant Fit T5, 28W, 3500 Lumens, 4000K or 5000K

$298.18
25PK 2ft Instant Fit T8 Tubes, 1250 Lumens, 10W, 4000K or 5000K

25PK 2ft Instant Fit T8 Tubes, 1250 Lumens, 10W, 4000K or 5000K

$136.36
25PK 4ft Instant Fit T8 Tubes, 2200 Lumens, 16W, 4000K or 5000K

25PK 4ft Instant Fit T8 Tubes, 2200 Lumens, 16W, 4000K or 5000K

$159.09
25PK 4ft Integrated T8 Tubes, 1800 Lumens, 10.5W or 14W, 4000K or 5000K

25PK 4ft Integrated T8 Tubes, 1800 Lumens, 10.5W or 14W, 4000K or 5000K

$171.82
25PK 4FT LED T8 Tube Light, 2200 Lumens, Type B, 15W, 5000K, 120-277V

25PK 4FT LED T8 Tube Light, 2200 Lumens, Type B, 15W, 5000K, 120-277V

$210.50
12 PK 12 Watt 3' LED T8 LED Glass Tube, 1600 Lumens, A/C Direct or Ballast Compatible, Clear or Frosted Lens

12 PK 12 Watt 3' LED T8 LED Glass Tube, 1600 Lumens, A/C Direct or Ballast Compatible, Clear or Frosted Lens

$138.00
25 Pk 17 Watt T8 LED; 4Ft; 3000K; Medium Bi Pin base; 50000 Average rated hours; 2100 Lumens; Type B; Ballast Bypass; Single or Double Ended Wiring

25 Pk 17 Watt T8 LED; 4Ft; 3000K; Medium Bi Pin base; 50000 Average rated hours; 2100 Lumens; Type B; Ballast Bypass; Single or Double Ended Wiring

$216.67
12PK 3 ft. T8 LED Frosted Tube, 12W, 1600 Lumens, CCT Selectable, 120-277V

12PK 3 ft. T8 LED Frosted Tube, 12W, 1600 Lumens, CCT Selectable, 120-277V

$143.64
12 PK 15 Watt 4' LED T8 LED Glass Tube, 1800 Lumens, A/C Direct or Ballast Compatible, Clear or Frosted Lens

12 PK 15 Watt 4' LED T8 LED Glass Tube, 1800 Lumens, A/C Direct or Ballast Compatible, Clear or Frosted Lens

$118.00
4 Foot Retro Flex LED T5 Tube, 24W, 120-277V

4 Foot Retro Flex LED T5 Tube, 24W, 120-277V

$35.20
25 PK 17 WATT 4' T8 LED TUBE, 2200 LUMENS, 4000K, 120-277V

25 PK 17 WATT 4' T8 LED TUBE, 2200 LUMENS, 4000K, 120-277V

$266.50
25PK 3ft Integrated T8 Tubes, 1450 Lumens, 12W, 4000K or 5000K

25PK 3ft Integrated T8 Tubes, 1450 Lumens, 12W, 4000K or 5000K

$190.91
10PK 8ft Integrated T8 Tubes, 5500 Lumens, 40W, 4000K or 5000K

10PK 8ft Integrated T8 Tubes, 5500 Lumens, 40W, 4000K or 5000K

$309.09
30 Pack, 4 Foot LED T8 Tube, 18 watt, Ballast Compatible or A/C Direct Wire, 120-277V

30 Pack, 4 Foot LED T8 Tube, 18 watt, Ballast Compatible or A/C Direct Wire, 120-277V

$299.99
10PK 8FT LED T8 Tube Light, 5000 Lumens, Type B, 42W, CCT Selectable, 120-277V

10PK 8FT LED T8 Tube Light, 5000 Lumens, Type B, 42W, CCT Selectable, 120-277V

$270.00
12PK 4FT LED AC Direct Ballast T8 Glass Tube, 17W, 2200 Lumens, 4000K or 5000K CCT, 120-277V

12PK 4FT LED AC Direct Ballast T8 Glass Tube, 17W, 2200 Lumens, 4000K or 5000K CCT, 120-277V

$97.27
25 Pk 4 Foot LED T8, Ballast Compatible, 11 watt

25 Pk 4 Foot LED T8, Ballast Compatible, 11 watt

$164.99
12PK 3 ft. T8 LED Tube, 12W, 1600 Lumens, CCT Selectable, 120-277V

12PK 3 ft. T8 LED Tube, 12W, 1600 Lumens, CCT Selectable, 120-277V

$143.64
25PK 3ft Instant Fit T8 Tubes, 1450 Lumens, 12W, 4000K or 5000K

25PK 3ft Instant Fit T8 Tubes, 1450 Lumens, 12W, 4000K or 5000K

$136.36
12PK 2 ft. T8 LED Tube, 8W, 1200 Lumens, CCT Selectable, 120-277v

12PK 2 ft. T8 LED Tube, 8W, 1200 Lumens, CCT Selectable, 120-277v

$125.45
25 Pk 3 Foot SATCO 10 Watt; 3 Foot LED T8; Medium Bi Pin base; 3000K, 3500K, 4000K, 5000K; 50000 Average rated hours; 1450 Lumens; Type A; Ballast dependent

25 Pk 3 Foot SATCO 10 Watt; 3 Foot LED T8; Medium Bi Pin base; 3000K, 3500K, 4000K, 5000K; 50000 Average rated hours; 1450 Lumens; Type A; Ballast dependent

$241.67
25PK 14.5W 4' T8 LED Tube, 2000 Lumen Max, 240° Beam Angle, Ballast Bypass, 120-277V

25PK 14.5W 4' T8 LED Tube, 2000 Lumen Max, 240° Beam Angle, Ballast Bypass, 120-277V

$233.33
25PK 15W 4' T8 LED Tube, 2000 Lumen, 240° Beam Angle, Ballast Bypass, 120-277V

25PK 15W 4' T8 LED Tube, 2000 Lumen, 240° Beam Angle, Ballast Bypass, 120-277V

$254.17
12 PK 18 Watt 4' LED T8 LED Glass Tube, A/C Direct or Ballast Compatible, Clear or Frosted Lens

12 PK 18 Watt 4' LED T8 LED Glass Tube, A/C Direct or Ballast Compatible, Clear or Frosted Lens

$118.00
SATCO 14W T8 LED; Medium bi-pin base; 50000 Average rated hours, 120-277V, 3000K

SATCO 14W T8 LED; Medium bi-pin base; 50000 Average rated hours, 120-277V, 3000K

$7.92
25PK 4 ft. T8 LED Tube, 18W, 2340 Lumens, 4000K or 5000K CCT, 120-277V

25PK 4 ft. T8 LED Tube, 18W, 2340 Lumens, 4000K or 5000K CCT, 120-277V

$370.83
12PK 4FT LED AC Direct T8 Tube, 18W, 2200 Lumens, 4000K CCT, 120-277V

12PK 4FT LED AC Direct T8 Tube, 18W, 2200 Lumens, 4000K CCT, 120-277V

$72.36
25PK 4ft Instant Fit T8 Tubes, 1800 Lumens, 13W, 4000K or 5000K

25PK 4ft Instant Fit T8 Tubes, 1800 Lumens, 13W, 4000K or 5000K

$147.73
25PK 2 ft. T8 LED Tube, 10W, 1300 Lumens, 4000K or 5000K CCT, 120-277V

25PK 2 ft. T8 LED Tube, 10W, 1300 Lumens, 4000K or 5000K CCT, 120-277V

$329.17
25PK 4 ft. T8 LED Frosted Tube, 18W, 2340 Lumens, 4000K or 5000K CCT, 120-277V

25PK 4 ft. T8 LED Frosted Tube, 18W, 2340 Lumens, 4000K or 5000K CCT, 120-277V

$370.83
10 Pk SATCO 25W T5 LED; Miniature bi-pin base; 3500K, 4000K or 5000K; 50000 Average rated hours; 3500 Lumens

10 Pk SATCO 25W T5 LED; Miniature bi-pin base; 3500K, 4000K or 5000K; 50000 Average rated hours; 3500 Lumens

$139.17
25 Pk 9 Watt T8 LED; 2Ft; 3500K; Medium Bi Pin base; 50000 Average rated hours; 1100 Lumens; Type B; Ballast Bypass; Single or Double Ended Wiring

25 Pk 9 Watt T8 LED; 2Ft; 3500K; Medium Bi Pin base; 50000 Average rated hours; 1100 Lumens; Type B; Ballast Bypass; Single or Double Ended Wiring

$216.67
24 Pk 4 Foot LED T5, Ballast Compatible, 15 watt

24 Pk 4 Foot LED T5, Ballast Compatible, 15 watt

$228.00
10PK 8ft Integrated R17d T8 Tubes, 5500 Lumens, 40W, 4000K or 5000K

10PK 8ft Integrated R17d T8 Tubes, 5500 Lumens, 40W, 4000K or 5000K

$318.18
25 Pk SATCO 13W T8 LED; Type A + Type B; Medium bi-pin base; 50000 Average rated hours

25 Pk SATCO 13W T8 LED; Type A + Type B; Medium bi-pin base; 50000 Average rated hours

$318.75
24 PK SATCO 13W T8 U-Bend LED; 50000 Average rated hours; Medium bi-pin base

24 PK SATCO 13W T8 U-Bend LED; 50000 Average rated hours; Medium bi-pin base

$500.00
20Pk 4 ft. T8 LED Tube With Emergency Battery, 18W, 2,200 Lumens, 4000K or 5000K CCT, 120-277V

20Pk 4 ft. T8 LED Tube With Emergency Battery, 18W, 2,200 Lumens, 4000K or 5000K CCT, 120-277V

$2,199.99
25PK 2ft Integrated T8 Tubes, 1150 Lumens, 9W, 4000K or 5000K

25PK 2ft Integrated T8 Tubes, 1150 Lumens, 9W, 4000K or 5000K

$190.91
25 Pk SATCO 13.5 watt T8 LED; Medium Bi Pin base; 50000 Average rated hours; Dimmable

25 Pk SATCO 13.5 watt T8 LED; Medium Bi Pin base; 50000 Average rated hours; Dimmable

$370.00
10 Pk SATCO 43W T8 LED; Single pin base; 50000 Average rated hours; 5500 Lumens

10 Pk SATCO 43W T8 LED; Single pin base; 50000 Average rated hours; 5500 Lumens

$373.64
25 Pk SATCO 13W T5 LED; Miniature bi-pin base; 50000 Average rated hours; 120-277V

25 Pk SATCO 13W T5 LED; Miniature bi-pin base; 50000 Average rated hours; 120-277V

$406.82
25 Pk SATCO 14 Watt; 4 Foot LED T8; Medium Bi Pin base; 5000K; 50000 Average rated hours; 2200 Lumens; Type A; Ballast dependent

25 Pk SATCO 14 Watt; 4 Foot LED T8; Medium Bi Pin base; 5000K; 50000 Average rated hours; 2200 Lumens; Type A; Ballast dependent

$225.91

Product Description

Professional-grade 4-foot LED sign lamp engineered for superior illumination in single or double-sided applications. Features Keystone Color Select Technology with three color options (4000K, 5000K, 6500K) to match your signage needs. Advanced optical lens design delivers 360° beam spread with zero hot-spotting, ensuring even light distribution across the entire sign face. Built for longevity with 50,000+ hour lifespan and rated for extreme temperatures from −22°F to 131°F. Operates on standard 120–277V input with no external driver required—simply install into existing sockets using the ballast raceway. Rotatable end caps provide flexible positioning for optimal light angles. UL Classified to UL 48/UL 879A standards and listed in the UL SAM Manual. Delivers over 50% greater energy efficiency than HO fluorescent alternatives, reducing operational costs while maintaining brilliant, consistent brightness. Patent-protected technology ensures reliable performance in demanding commercial and industrial sign applications.

Product Description

Professional-grade 4-foot LED sign lamp engineered for superior illumination in single or double-sided applications. Features Keystone Color Select Technology with three color options (4000K, 5000K, 6500K) to match your signage needs. Advanced optical lens design delivers 360° beam spread with zero hot-spotting, ensuring even light distribution across the entire sign face. Built for longevity with 50,000+ hour lifespan and rated for extreme temperatures from −22°F to 131°F. Operates on standard 120–277V input with no external driver required—simply install into existing sockets using the ballast raceway. Rotatable end caps provide flexible positioning for optimal light angles. UL Classified to UL 48/UL 879A standards and listed in the UL SAM Manual. Delivers over 50% greater energy efficiency than HO fluorescent alternatives, reducing operational costs while maintaining brilliant, consistent brightness. Patent-protected technology ensures reliable performance in demanding commercial and industrial sign applications.

>

Recently Viewed