Thorn Jet-1 CL1 57w TC-EL lantern
for 57w PLT-4 Pin Compact Fluorescent lamps
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Thorn Jet-1 57w CFL lantern. Released by Thorn Lighting in early 2006, the Jet is a contemporary, but compact streetlighting fitting that is constructed from die-cast aluminium with the control gear and optics all contained within the same IP65 housing. Available in two sizes (Jet 1 and Jet 2), it is designed for use with a multitude of lamp types and is suitable for applications such as: car parks, minor and major roads, and residential areas and public spaces. According to the manufacturers publicity the lantern's specification is as follows: Specification Aluminium IP65 compact street lantern for 50 - 150W, HST high pressure sodium tubular/70 - 150W, HIT-CE ceramic metal halide/80 - 125W, HME high pressure mercury/42 - 70W, TC-TEL compact fluorescent lamps. For side entry mounting Ø42-60mm, with zero tilt, or post top Ø60mm or Ø76mm (mounting accessory) with 5°/10°/15° optional tilt angle. As Thorn Jet 1 & 2.
Tiltable spigot mounting adaptor. Photo: Thorn Lighting Materials/Finish
Changing a Metal Halide lamp in a Jet-2. Photo: Thorn Lighting Installation/Mounting Suitable for side entry Ø42-60mm. Zero degrees tilt. Accessory available to allow Ø34mm mounting. Cable gland for 8mm to 13mm diameter cable. Post top mounts via adaptor. Choice of Ø60mm or Ø76mm versions both with 5°/10°/15° step tilting angle. Spigot depth side entry 100mm, post top 100mm. Access to lamp from below via hinged enclosure released by single stainless steel toggle clip. Replacement of lamp possible in seconds without tools. Access to integral gear tray via enclosure. Gear tray secured to body by two screws. Delivered ready to install, complete with factory-fitted integral gear tray, all supplied in a single carton (without lamp). Lantern in the Collection: The example in the collection is a 57w PLT lamped variant and had been used for evaluation purposes on an installation in South Yorkshire. The reason for its early demise is not known, but the lantern may have been removed due to a fault; however, it has yet to be tested, so this cannot be confirmed at the time of writing.
The Thorn Jet-1 is a tiny lantern and is not much bigger than a Thorn Beta-5 35w SOX lantern The mobile phone gives us an idea of the lantern's size.
The finned area at the back of the lantern is to help disperse heat from the ballast trapped inside the canopy. This example is fitted with a NEMA socket, which has clearly seen use. The yellow sticker should be removed before fitting a photocell, but many lighting engineers don't bother unpeeling it, but merely puncture it with the prongs of the photocell during fitment.
Underside of the Thorn Jet-1, showing the one piece plastic bowl with frosted rear section that is intended to hide the control gear from view. The clear plastic section of the bowl has unfortunately become marked through the lantern being mishandled by engineers; hopefully, this will polish out.
Left: Looking more like a shuttle ship from a science fiction film than a street light, this rear view of the Jet shows to good effect the cooling fins, and the large spigot receptor that is also designed to be fitted with a special adaptor to allow post top mounting and tilting of the lantern. Right: The front underside view of the Jet - the view seen from street level. The Jet-1 appears to be almost spherical in this front-on view.
With the lantern upturned and the quick-release bowl removed, we can see that the lamp compartment and gear compartment are integral within the same IP65 housing.
The lantern's control gear consists of a Philips HF-P12642PL-T/C HF-Performer electronic ballast.
The GX24q-5 lampholder for the 57w PLT 4-pin lamp, seen from inside the lamp compartment.
The adjustable focusing mechanisium for the lamp.
Awaiting image Awaiting image of an in-service Thorn Jet For more information about the Thorn Jet visit: http://www.thornlighting.com/pdfs/new_product_brochures/jetbrochure.pdf |
Copyright(c) 2005 Claire Pendrous. All rights reserved.
Please note that all pictures are by Claire Pendrous, or are part of the Claire Pendrous photographic collection unless otherwise stated; none of these images can be copied without obtaining prior permission.