Giant Screw (GES / E40)

The Giant Screw cap (or Goliath screw cap, as it is sometimes known) is the largest of the Edison Screw fittings. Not as common as either E14 or E27 screw caps, the Giant Screw base can nonetheless be found on industrial lamps designed for applications such as high-bay warehouse lighting, forecourt lighting, or car park lighting.

Alternative names:

E40 (Edison, 40mm diameter), GES (Giant/Goliath Edison Screw).

Bulb types:

Dual SON & Mercury, Mercury MBF-U, Metal Halide, SON-E, SON-T.

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  1. Venture 150W Natural Deluxe SON-T - Giant Screw Cap

    20% Off
    Special Price £20.15 £16.79 Regular Price £25.19
    Out of stock
  2. Philips 250W HPI - T Plus Tubular Metal Halide

    £29.99 £24.99 As low as £33.83
  3. Philips 250W Master HPI Plus Frosted Elliptical Metal Halide

    £31.19 £25.99 As low as £35.27
    Out of stock
  4. Philips 400W HPI - T Plus Tubular Metal Halide

    £29.99 £24.99 As low as £33.83
  5. Sylvania 400W SON-E - G.Screw

    £14.39 £11.99 As low as £16.55
  6. Kosnic Doughnut 100W Daylight LED Corn Lamp - Giant Screw Cap

    £83.99 £69.99 As low as £95.75
  7. Kosnic Petal 45W Daylight LED Corn Lamp - Giant Screw Cap

    £59.99 £49.99 As low as £68.39
  8. Philips TrueForce 88W Cool White LED High Bay Lamp - Giant Screw Cap

    £143.99 £119.99 As low as £164.15
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