Now the Position: Home > Information Center > body

Policy for LED Linear Replacement Lamps in DLC Technical Requirement Table Version 3.0

DLC Technical Requirements Table Version3.0, released by Designlights Consortium, has complemented the previous version 2.1 on many aspects. Of which policy for LED linear replacement lamps indicates new standards and changes. Here makes one brief introduction to the details represented in Version 3.0.

dlc technical requirements table version3.0

LED Linear Replacement Lamps Classification and Application

According to UL classification and under Technical Requirements Table Version 3.0, LED linear replacement lamps will cover one of the four primary use:

1. UL Type A-Two-foot or four-foot LED tube lights designed to plug and play replacements for fluorescent lamps

Products in this category is proven compatible with old existing electronic ballast, which can operate off the old ballast and do not require mechanical or electrical changes to fixtures.

2. UL Type B-Internal Driver Line Voltage LED Tube Lamp-Style Retrofit Kits

Products in this category are two-foot or four-foot LED tube lights designed to replace old fluorescent lamps. Compared with Type A, Type B LED tube lights do not operate off the old electronic ballast and moreover these tube lights require rewiring of the existing fixture to bypass the ballast and send line voltage directly to the lamp holders.

3. UL Type C-External Driver LED Tube Lamp-Style Retrofit Kits

Products in this category are two-foot or four-foot LED tube lights to replace existing fluorescent lamps. These lamps do not operate off the old electronic ballast and require rewiring of existing fixtures with an external driver.

The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external diver. Note that due to testing considerations, only one- or two-lamp four-foot lamp systems, or one- and three-lamp two-foot lamp systems are eligible.

4. Type A and Type B-Dual Mode Internal Driver

Four-foot or two-foot LED “tubes” designed to replace four-foot or two-foot fluorescent lamps, respectively. Products in this category have the ability to operate off the existing fluorescent ballast and also have the ability to operate off of line voltage if the troffer is rewired to bypass the ballast. These products connect to the troffer using standard pin-base connections to the lamp holders. Note that at this time only products that can operate off electronic instant start ballasts are eligible. Products that are designed to operate off magnetic or non-instant start electronic ballasts are not eligible.

Safety Certification

DLC states that document of safety certification for LED linear replacement lamp must be submitted with the application, which indicates safety certification has been obtained.

Installation Instruction Document

Similar to safety certification, installation instruction sheet should be submitted with the application to indicate how the LED linear replacement lamp will be installed in an existing fixture in the field.

Lamps that require specialized components in order for installation to perform to the above criteria are not eligible for qualification. Lamps that employ rotatable end-caps are eligible, but must clearly indicate this feature in the product specification sheet.

Test Requirements

For testing purpose, DLC require testing both bare lamps and lamps installed in one typical fixture housing.Here are the basic points to keep in mind.

All lamps seeking qualification of the DLC must test the bare lamp according to LM-79.

For Replacement Lamps designed to operate off existing fluorescent ballasts, testing must be conducted using a standard 0.88 ballast factor, electronic instant-start ballast.

For lamp-style retrofit kits (i.e. products connecting mechanically and electrically via lamp holders, but which require an electrical modification to the existing fixture to bypass the existing ballast), "lamp"-level testing is also required. If the system is designed to operate multiple lamps off an external driver, the driver should be loaded as it would be in the field, with appropriate steps taken to calculate the efficacy of the single lamp. For example, for a two-lamp kit, one lamp should be measured for light output, while the system as intended (with two identical lamps on the driver) should be measured for electrical input. The wattage into the driver can then be divided by two, and that wattage divided into the lamp lumens to determine system efficacy.

Note: Article resources result from

Send us a message
My status