Do LED Lights Require a Transformer?
Transformers are necessary for all mains-powered LED lamps. The transformer/driver may be positioned outside or within the bulb housing, depending on the kind of bulb. The transformer's function is to lower mains voltage (240V) to the necessary level in relation to the powered bulb (e.g. 12V or 24V).
Which lightbulbs need a transformer when switching to LEDs?
The majority of individuals who convert to LED do so for home purposes. In most situations, the housing of the specific LED light bulb will house the necessary driver for powering that bulb. This indicates that the bulb is prepared for usage and doesn't need any more thought about drivers or transformers. The following light bulbs may be utilized without the usage of an external transformer since they include an LED driver:
Button bayonet caps (e.g. B22)
Screw-on bulb covers (e.g. E26, E27)
Caps in the twist-and-lock style (e.g. GU10, GU24)
Although the term "LED transformer" has become a common umbrella term for all drivers and transformers, the term "transformer" should be reserved for larger LED lighting projects requiring a more powerful external supply. This is why the transformer is referred to as a "driver" in relation to domestic LED bulbs (see below for further details).
What distinguishes an LED "driver" from an LED "transformer"?
LED drivers and LED transformers both serve the same purpose when connected in an electrical circuit between a mains power source and an LED light (i.e. each serves to reduce the power supply that is fed into the bulb). But there is a clear distinction between the two electrical parts. In residences in the UK, the mains voltage is close to 240V. A driver/transformer must be added in the circuit to safeguard the bulb since LED bulbs made for home use need a substantially lower power supply to operate properly for the duration of their estimated lifespan. The power output is the primary distinction between LED drivers and LED transformers:
Driven LEDs
LED drivers typically have a maximum power output of between 100 and 200W. Since individual LEDs may only need 2V to 4V DC, LED drivers are the preferred power source for tiny LED lighting systems in the house. A significantly greater voltage is needed when LEDs are linked in a series, or "array," as the case may be. An LED transformer might be built in this scenario (e.g. to power a light strip).
LED Transformers LED transformers provide a better control over electrical power flow. For larger-scale LED lighting projects like strip lighting, often known as "LED tape," transformers provide the "heavy-lifting" power supply option. For further information on using an LED transformer with an LED light strip, see the section below.
