Tungsten filament lamp:
The least efficient of all electric lamps.
Phased-out over the past few years, with government looking for a shift towards low-energy lighting.
A 60W lamp could be bought for less than £1.00, but the ban on general lamps is being countered by the reactionary forces on the high street by industrial 'rough service' GLS lamps, which can cost over £3.00 per lamp.
Why would you??
DIMMING: All filament lamps are dimmable.
Tungsten halogen lamp:
The filament lamp is still with us, via the application of tungsten halogen technology to the conventional bulb type of lamp.
These lamps are typically 30% more efficient than the lamps that they replace (42W replaces 60W, for example)
The 42W version costs £2.00+
NOTE: these lamps are not rated as low energy as defined by The Building Regulations and the lighting industry is moving away from using them..
DIMMING: All tungsten halogen lamps are dimmable.
Compact fluorescent lamp (CFL):
The first proper low energy lamp to become available to the general public, and offered in most supermarkets.
Was heavily subsidized by government and energy companies to excourage energy saving across the country, though the cost of these lamps is now becoming normalised.
The 20 - 23W versions cost £4.00 - £10.00 depending on the lamp style and the manufacturer / supplier.
DIMMING: Only specific CFL are dimmable and are labeled accordingly. Dimming costs a few pounds extra..
The latest low-energy technology to become available to the domestic market.
The LED is now pretty much more efficient than the equivalent CFL, but the real-world evidence suggests that there's still some way to go before the energy improvement trumps the higher price.
DIMMING: as with CFLs, only specific LED lamps are dimmable and are labeled accordingly. The market is shifting towards all LED lamps being dimmable.
One of the major technological differences between the CFL and the LED lamp is reflected in the life-term of the lamps and then there's the issue of what goes into the lamps when they are manufactured.
LED lamps are typically rated at 50,000 hours, whereas the CFL lamp typically has a life of 8000 hours. But LED life is an industry concern and I urge you to check and then double check and then have your supplier sign a confirmation in their own blood before accepting the marketing puff.
The biggest ecological issue around CFL lamps is the mercury that they contain (the official name for a CFL is a mercury discharge lamp, so its difficult to remove the mercury entirely, although efforts are being made to replace it with something more eco-friendly.
Although government and local authorities have tried to encourage the public to dispose of old CFL lamps properly, via local recycling sites (the lamp is considered as Hazardous Waste), its believed that the majority of CFL lamps are going to landfill, from where the mercury finds its way into groundwater.
The use of CFL is now measured in millions of lamps, and that's quite a lot of mercury being lost.
LEDs will eventually find their way to landfill, but its felt that the component elements in the lamp are more safely embedded into the LED chip. We will, however, be losing a quantity of precious metals and toxic substances such as arsenic. This is driving far more interest in recovering precious and rare metals and we can expect to see a more pro-active approach in re-claiming old lamps in the near future.
Home lighting - making it a bit special
Think Global - Act Local!
Talking about LED light bulbs
Lighting the Home: Design Starts Here ... not Here!
Lighting the Home: by The Rules
Lighting the Home: The Kitchen: 2
Lighting the Home: The Basics
Lighting the Home: all those Lamps!
Lighting the Home: Keeping it Real
Lighting the Home: Having Fun!
Lighting the Home: The Bathroom 2
Lighting the Home: Lighting Control
Lighting the Home: The Kitchen 1
Lighting the Home: The Bathroom 1
John Bullock writes a regular column for lighting magazines. You can find all of the archived pieces here.
BLOGS - LIGHTING DESIGN
John Bullock writes about all things and anything concerning architectural lighting design; new technologies and old lamps; anything,really.
HOME LIGHTING CONSULTANT
John Bullock designs innovative lighting designs for people's homes. By working closely with clients he is able to deliver solutions that meet - and exceed - their expectations.
BLOGS - CPD RIBA CORE PROGRAMME 2015
John Bullock will be presenting a seminar on latest lighting design and technologies as part of the RIBA CPD Core programme 2015
BLOGS - SUSTAINABILITY
John Bullock believes that the UK lighting industry needs to embrace a sustainable way of delivering good quality product through good design, fabrication and end-of-life management.
CONDUIT (6) - Lighting for Winter Gardens
CONDUIT 5: Home Lighting - LED Lighting (2)
FX Magazine: Lighting Focus - Sustainability (Issue 258)
CONDUIT 4: Home Lighting - LED Lighting (1)
Can Smart Lighting Save The Planet?
CONDUIT 3: Home Lighting - The Bathroom
Can Lighting Save Us From Ourselves . . . NO!
CONDUIT 2: Home Lighting - The Dining Room