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Krypton/Xenon

All the light bulbs in this category use krypton and/or xenon as part or all of the gas fill. Most standard incandescent light bulbs are filled with inert argon plus enough nitrogen to suppress arcing between the lead-in wires. Krypton and xenon gas contribute two features that improve the efficacy (or efficiency) of the lamp compared to ones filled with argon. Firstly, both gases have a lower heat conductivity than argon. Secondly, the larger molecule size of both gases retards the evaporation of the tungsten filament and increases bulb life. Xenon is an improvement over krypton for both factors.

Depending on bulb size, type of filament and mixture ratios, adding krypton and xenon gas can increase the efficacy of the lamp by 7% to 20%. Xenon is the more expensive of the two and is used primarily for special application bulbs.

Why Krypton and Xenon Bulbs Have Longer Rated Life

You may have wondered why some bulbs feature krypton or xenon gas. For many years, incandescent bulbs were filled with nitrogen gas. When argon became more affordable, it was substituted for nitrogen because it decreased the rate of evaporation of the tungsten filament and increased bulb life. More recently, krypton or xenon are used in some bulbs in place of argon. Because the molecular size is larger than argon, both these inert gases do a better job of retarding the evaporation of the filament and give longer life to the bulb. Also, since both krypton and xenon have lower heat conductivity than argon, the filament temperature is higher which increases the efficacy of the bulb. Xenon is better than krypton at both of these enhancements, but it is significantly more expensive. These specialty gases are used in filament bulbs where the added cost is justified by the improved performance.

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  1. Eiko KPR103 Bulb | 0.75A 3.6V Krypton B3 1/2 SC Miniature Flanged Base
  2. Eiko KPR118 Bulb | 0.55A 7.2V Krypton B3 1/2 SC Miniature Flanged Base
    Price: $0.85
    1 to 9 $0.85 each
    10 to 29 $0.75 each
    30 and above $0.67 each

    In Stock

  3. KPR2 Bulb 2.38V .5A B3-1/2 Krypton Single Contact Mini Flange Base
  4. Bulbrite KR40ETC/32 Bulb | 40W 120V B10 Krypton Medium Base
    Price: $1.95
    1 to 9 $1.95 each
    10 to 29 $1.84 each
    30 and above $1.79 each

    In Stock

  5. Bulbrite KR60CFC/32 Bulb | 60W 120V CA10 Krypton E12 Base
    Price: $1.95
    1 to 9 $1.95 each
    10 to 29 $1.44 each
    30 and above $1.40 each

    In Stock

  6. Bulbrite KR10CTC/25 Bulb | 10W 120V B8 Krypton Candelabra Base
    Price: $1.95
    1 to 9 $1.95 each
    10 to 29 $1.65 each
    30 and above $1.60 each

    In Stock

  7. CEC XPR18 Bulb | 0.59A 18V T3.25 Single Contact Miniature Flange Base
  8. Standard KPR104 Bulb | 1.03W 2.2V B3.5 Flashlight Bulb - P13.5s Base
  9. Bulbrite 715606 - 5W 24V Festoon - Xenon - Clear
    Price: $2.95
    1 to 9 $2.95 each
    10 to 29 $2.85 each
    30 and above $2.75 each

    In Stock

  10. Bulbrite 715508 XE18/12 | Incandescent Xenon Wedge Base
    Price: $2.95
    1 to 9 $2.95 each
    10 to 29 $2.93 each
    30 and above $2.84 each

    In Stock

  11. Bulbrite FEX3/24 3W X2000 Dimmable Xenon T3.25 Capsule Bulb - Festoon Base - 24V
    Price: $2.95
    1 to 9 $2.95 each
    10 to 29 $2.89 each
    30 and above $2.80 each

    In Stock

  12. KPR113 Bulb 4.8V .75A B3-1/2 Krypton Single Contact Mini Flange Base
  13. Bulbrite RLX5/12 5W X2000 Dimmable Xenon T3.25 Capsule Bulb - Rigid Loop Base - 12V
    Price: $2.95
    1 to 9 $2.95 each
    10 to 29 $2.89 each
    30 and above $2.80 each

    In Stock

  14. CEC XPR19 Bulb | 0.60A 19.2V T3.5 Single Contact Miniature Flange Base
  15. Bulbrite FEX5F/12 5W X2000 Dimmable Xenon T3.25 Capsule Bulb - Festoon Base - 12V - Frost
    Price: $2.95
    1 to 9 $2.95 each
    10 to 29 $2.89 each
    30 and above $2.80 each

    Please Note: 4-6 Week Delivery

  16. Bulbrite 715545 XE5F/24 | 5W Xenon Wedge Base Frosted Bulb
    Price: $2.95
    1 to 9 $2.95 each
    10 to 29 $1.95 each
    30 and above $1.89 each

    In Stock

  17. Bulbrite FEX5F/24 5W X2000 Dimmable Xenon T3.25 Capsule Bulb - Festoon Base - 24V - Frost
  18. Standard KPR102 Bulb | 2.4W 2.4V B3.5 Flashlight Bulb - P13.5s Base
  19. Bulbrite JC20XEF/12 20W X2000 Dimmable Xenon T3 Capsule Bulb - Bi-Pin G4 Base - 12V - Frost
  20. Bulbrite JC20XE/12 - 20W 12V Xenon - KX-2000
    Price: $3.95
    1 to 9 $3.95 each
    10 to 29 $3.52 each
    30 and above $3.41 each

    In Stock

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