Support & FAQ

Instructions are included with each Armacost Lighting product and can also be downloaded from the specific product page. Please review instructions thoroughly in order to understand how products work and are properly configured and installed. If you are still experiencing issues or need to speak with an installation technician, please email us at or call us at 410-354-6000 (9 am to 5 pm Eastern U.S. time, Monday through Friday). Our team typically responds within 24 hours, but times may vary depending on volume.

Frequently Asked Questions

Here are some of the support questions we get most often.


Although RibbonFlex Pro tape light is thin and flexible, do not bend strip lights or make sharp turns. The preferred method to make turns is to use SureLock connectors. Alternatively, use WireGrip connectors with wire or solder wire directly to the copper LED strip light’s copper pads. For a more detailed guide, see the Making corner turns with RibbonFlex tape light PDF.


For under cabinet lighting, mount the LED tape to the back side of the cabinet lip. RibbonFlex Pro has a wide 120 degree beam angle, and by installing the tape lighting on the cabinet lip it will eliminate LED bright spots on reflective counter top surfaces. For detailed installation photos, including techniques for running tape light from one cabinet to another, see this PDF. Alternatively, using channels with diffused lenses minimizes bright spots on counter tops. They also deliver protection and a more finished look to the LED tape light installation.

If a user has connected two or more sets of strip lights together, this is most likely a polarity or connection issue. When connecting two pieces of white tape light, connect positive wires to positive (+ to +) and negative wires to negative (– to –). Polarity is easily identified with + and – markings on the LED tape as shown.

When connecting two pieces of multi-color RGB tape light, connect the +12V/G/R/B indicators on the tape light to maintain polarity and correct color sequencing. (The same concept applies to RGB+W tape light. Just match the corresponding markings, such as +24V/G/R/B/W, when connecting.)

An easy way to check polarity when using a connector is to look for the Armacost Lighting AL logos. If they are not oriented the same way there will be a polarity issue.

To jump the obstacle, use a connect a length of wire to the two strips of tape light. This can be done with a WireGrip connector and an appropriate length of wire or a SureLock connector can be extended to connect two LED strips. To extend the length, cut the SureLock Wire Lead connector in half, and splice a wire to the two ends of the connector.

Cut SureLock wire lead connector in half to create two leads


Splice wire in between to extend (shown with Euro-Style terminal block connections)

Illustrations show 2-wire white LED wire connections. The same principle applies for 3-wire, 4-wire, and 5-wire connections.

LED strip light brightness is dependent upon density of the LEDs on the strip. RibbonFlex Pro 120 LEDs/m is the brightest LED tape light product we offer, delivering a super bright output designed for task lighting. 60 LEDs/m is bright enough for a broad range of undercabinet and accent lighting. 30 LEDs/m is less bright and best for accent lighting applications. All RibbonFlex Pro LED light strips are fully dimmable from 100% – 0%.


When your counter top is highly reflective, the best method for mounting LED tape for under cabinet lighting is to install the tape lighting flat up against the back side of your cabinet lip. RibbonFlex Pro has a wide 120 degree beam angle, and by installing the tape lighting on the cabinet lip it will eliminate LED bright spots on reflective counter top surfaces while washing the surface and backsplash with light. For detailed installation photos including techniques for running tape light from one cabinet to another, view this PDF.

A non-dimmable LED should not be connected to dimmable system. If this does occur lighting performance will be impacted. LEDs may blink, flicker or otherwise not work as intended.

Power Supplies

The choice between LED power supply types is based on preferred dimming and control method. If a user wishes to dim an LED lighting system with a 120-volt AC dimmer switch, a universal AC dimmable driver must be selected. If a user wishes to control an LED lighting system on the output or DC side of the power supply, either a standard or universal driver may be utilized. To compare both check out our LED power supply page.

No, a higher wattage power supply will not increase the brightness of the LED tape light.

Provided the power supply output voltage matches the lighting’s rated voltage, a higher wattage power supply will not harm the LED tape lighting.

No, multiple types of LED lighting can be wired to the same power provided the lighting is all rated the same voltage and does not exceed the rated wattage of the power supply.

Lighting Control

Yes, a dimmer switch (i.e. Lutron or Leviton) can be used with low voltage lights, but an AC dimmable power supply must be utilized. A special dimmer switch is not required for LED lights; most modern dimmers are compatible with Armacost Lighting AC Dimmable Power Supplies (learn more). Dimmable products will operate under the full dimming range adjustment 0% – 100%. Do not use an AC dimmer with standard electronic power supplies; they are not compatible. If you are unsure what type you have, go here. To learn more about dimming white LED lighting and what may be your best installation option based on your application and power supply, please visit LED Dimming Basics.

For optimal AC dimming performance, use a forward phase CL-style or equivalent dimmer. The use of reverse phase or ELV dimmers may degrade performance.

No, use only one dimmer or one color controller per power supply in your LED lighting application. If you connect more than one of these components to a single power supply, you will experience poor performance issues (irregular dimming, inconsistent/uneven illumination) with your lighting.

Wire a low-voltage dimmer or controller between the low-voltage side of the power supply and the LED lights. Armacost Lighting offers a variety of low voltage dimmers and controls for white and color strip lights.

To enable a remote the first time it is used, pull out the plastic barrier sheet from the battery compartment located on the bottom of the remote. If it is an older remote, the battery may need to be replaced. It is possible that the remote has lost connection with the receiver; in this case it must be re-paired. For instructions regarding how to re-pair remote, refer to installation guide.

Lighting Accessories

For these types of lighting configurations, referred to as a center feed (two runs) or an array (three or more runs), each run of LED tape light must have a power wire connected to the power supply, dimmer or controller using one of the options shown in the illustrations below.

To create additional power wires, use a SureLock Extension connector, cut a SureLock Wire Lead connector in half, or solder wire to the copper pads on the tape, maintaining polarity.

Center feed wire to two tape light strips, three connection methods: twisted wires secured with wire nuts, Euro-Style Wire Connector, and Wire-to-Wire Spring Connector. Illustrations show 2-wire white LED wire connections. The same principle applies for 3-wire, 4-wire, and 5-wire connections.

Remember to always review the troubleshooting section of the instructions included with your product (or download them on the product page). The solution may be a simple adjustment as outlined in these guidelines. If, after troubleshooting, you are still experiencing an issue, please email us at

Additional Resources