Voltage Regulators and Flexible LED Strip


This article really only applies to situations where you are considering using the flexible LED strip in a battery-driven system such as in a boat, Caravan or Motorhome. We’re going to recommend that you consider using a separate voltage regulator in these situations. If, however, you are going to use the strip at home powered by a suitable LED Driver (transformer) then you need read no further!

Flexible LED strip is designed to operate from a specific voltage supply, usually 12 or 24 volts DC but when your boat or vehicle is on hook-up, shore power or the battery is being charged through your engine or a separate generator, you will be having more than 12 or 24 volts running through the system.

I’ll illustrate what I mean with reference to a 12 volt system but the principal applies equally to the 24 volt situation – just double the numbers!

When the 12 volt battery is being charged you will find 14.4 volts running through all your 12 volt circuits. All of our other LED bulbs and your other 12 volt appliances on board (e.g. your telly, fridge etc) will have protective circuitry built in which protects the sensitive components from this “over-voltage”.

However, the LED strip DOES NOT have these protective circuitry built in so the strip will recieve a higher voltage than it is designed for and this can stress the strip and shorten the life span of the LEDs and in some cases cause some overheating (not enough to cause danger to the vehicle/boat but possibly to the strip).

Adding a suitable voltage regulator into the lighting circuit which the strip will be connected to will overcome this possibility and your strip will last as long as it is designed to.

Please contact us if you need to discuss your own situation or require some advice as to the most suitable voltage regulator for your lighting.


Here’s a link to one of the options available but do contact us if you’re not sure!


Speak to you soon..


How to Change Halogen Bulbs to LED Lighting

Let There Be (LED) Light!
We’ve been working with 12 and 24 volt LED lighting for 10 years and having just completed our fourth Southampton Boat Show we thought this might be a good opportunity to review some of the commonly asked questions about replacing conventional lighting with LED alternatives.

LED Bulb Conversions
Traditional light fitting converted to LED bulb

What Wattage LEDs bulbs should I be looking for?
You can expect an LED to use approximately 10% of the power of an equivalent output conventional bulb, so if you have a 10 watt incandescent bulb, the equivalent LED would use 1 watt, a 20 watt halogen would be replaced by a 2 watt LED etc. Replacing the 20 watt halogen would save you 1.5 amps per hour on a 12 volt system!

How do I replace a halogen bulb?
This is usually fairly straightforward once you know what wattage of halogen bulb you have. In most circumstances a flat disc LED with appropriately positioned pins will give you the best results although there will usually be a suitable alternative if a disc is not appropriate for your particular fitting. Do check whether the bulb fits into the rear or the side of the light fitting otherwise Royal Mail will do well when you return the incorrect one to the supplier!
Changing halogen MR11 and MR16 bulbs is simply a case of changing to an LED with the equivalent light output.
LED Marine lights and LED Boat lights
How do I replace a “Car Bulb” type bayonet bulb?

You can buy LED “tower” or cylinder bulbs with a bayonet fitting already attached to a bayonet connector and they will do an acceptable job in some circumstances. However, in most instances, starting with an adaptor which has a bayonet fitting on one and a G4 fitting at the opposite end gives you a lot more control over the light output, directionality and light colour than the fixed bayonet option.

Whether you have a single pole or a double pole bulb, whether your bulb fits into the rear or the side of your fitting, whether you need directional light from a spotlight or all round light for a bulkhead light, starting with an adaptor gives you a wide range of choices.
One important thought – don’t assume that because you have double pole bulbs in the main saloon that you won’t have single pole bulbs elsewhere on board! We regularly receive phone calls following Southampton Boat Show with requests to swap the adaptors!
LED Article Bulb Image
Can we change festoon bulbs to LED?
Once again, the answer is yes but do check the length of the festoon (typically 37mm or 42mm) and the wattage.

Warm White or Cool White?
Most people find that Warm White LED is the preferred alternative as it is the closest colour of light to that of conventional lighting. Cool White LEDs will give you a brighter light but you may find the blue tones rather harsh although that’s very much a matter of personal taste.

To dim or not to dim?
An LED bulb has to be designed to dim so always seek advice before purchasing LEDs to be fitted into a situation where a dimmer is installed. Individually designed dimming systems can now be produced but we would need to know specific details about your set-up. This is mainly applicable to replacement LED bulbs as many new LED fixtures have the dimming capability as part of the unit.

What else should I look out for?
Always buy LED bulbs which have a wide voltage tolerance range (typically 10 – 30vDC) as this means that the bulb will be able to tolerate the variation in battery voltage output produced when the alternator kicks in or when you’re connected to shore power. This voltage will be more than sufficient for 12 volt systems and good quality bulbs will have sufficient extra capacity to accommodate the voltage variations produced in 24 volt systems.
The internet enables everybody to purchase directly from the manufacturers in China and this can appear to be a very attractive option. Do remember that most UK LED retailers have sampled products from many manufacturers before settling on their chosen supplier. If you’d like to gamble with your boat lighting then by all means buy direct from China and you may strike lucky!

Finally, if you want to upgrade or modernise your boat lighting there are some excellent new LED fixtures available to meet all requirements and budgets.

One last thought….with so many bulbs to choose from, if you’re unsure about anything, just ask!

Click Here to Visit our LED Site

Paul Crooks
JMG LED Lighting
07901 852950

How to convert a 12v/24v bayonet light fitting to an LED

How easy is it to convert a traditional light fitting to use an LED bulb?

The answer, thankfully is that it’s very easy nowadays. The photograph below shows a very popular light fitting which ordinarily uses a 20 watt incandescent bayonet bulb but which has been converted to an LED equivalent which uses only 2.5 watts – a saving of 17.5 watts EACH HOUR!

LED Bulb Conversions
Traditional light fitting converted to LED bulb

All that’s been used is an adaptor which has a bayonet fitting on one end and a G4 fitting at the other end, into which you place an LED bulb.

Using these adaptors gives you complete control of the power of the LED bulb and whether you want Warm White or Cool White LEDs.
Adaptor-for-JMG-LED-Blog12-LED-Rear-PinThis is the combination used in the fitting shown above but any of the bulbs shown on our site can be used:

LED Bulbs to exchange for Halogen Bulbs

The same principal applies if you have a light fitting where the bayonet bulb fits in sideways into the unit. In the following image, the same adaptor has been used and the end of the adaptor twisted around until the side fitting LED bulb pointed in the desired direction. (Make sure you take the bulb out before you twist the end of the adaptor…..or you’ll just pull the pins off the bulb!)


If you’re not sure about anything…give me a call on 07901 852950