Daytime Running Light
- Ground Vehicle Standard
- J2087_200603
- Revised
Scope
Rationale
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a
Maximum Candela Values AllowedBased on several study reports released from UMTRI as concerns from federal regulatory authorities regarding complains for glare, the new maximum candela values have been set for two cases. For the dedicated DRL, it is 1500 cd. This is harmonized with the current ECE requirement. For other lamps serving for DRL function, the maximum is kept at 3000 cd, however, it must be below the H-H line from H-V to left: to avoid glare.
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b
Unified Photometry Table for Other Lamps Serving DRL FunctionA new photometry table has been introduced in this version of J2807 in 6.2.2 as Table 2. This table is based on the bench mark studies of many existing DRLs and other lamps on the road. The photometry values have been derived with considerations of both the most effective DRL (reference to UMTRI reports) and adequate DRL when using other lamps. The new table provides the industry, in additional to consistence, more design freedom and flexibility. Table 1 has been kept in this version with only change for the maximum allowed candela value for the reasons stated in the above. The latest UMTRI report indicates that the (minimum) photometry values in the Table 1 is still most effective for DRL function. For those of the vehicle and lamp manufactures who apply dedicated DRLs on vehicle, Table 1 should be the standard to be used. The UMTRI report also indicates that other lamps serve as DRL functions provide some effectiveness for safety and conspicuity.
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c
Masking RequirementsFor the dedicated DRL with maximum candela value of 1500, no masking is needed in relating to the front turn signal lamps. For other lamps serving DRL function, the masking requirements are specified in 6.2.2.
Recommended Content
Classroom Training | Automotive Lighting: Design and Technology |
Data Sets - Support Documents
Issuing Committee
Signaling and Marking Devices Stds Comm
The Signaling and Marking Devices Standards Committee is part of the Lighting Systems Steering Committee that reports to the Motor Vehicle Council (MVC). The Committee is responsible for developing and maintaining SAE Standards, Recommended Practices, and Information Reports related to exterior lighting devices used on passenger cars, light trucks, vans and multipurpose vehicles. The Committee monitors the development of related technologies and determines how they may be applied to signaling and marking devices, while also working towards the development of standards to aid in the application of various technologies. The following task forces have been developed under the committee's scope: J1889 LED Signal Lighting Task Force New Technology Signal Lighting Task Force J2030 Discharge Signal Lighting Task Force Geometric Visibility Task Force Miniature Bulb Task Force J593 Backup Lamp (Reversing Lamp) Task Force J2087 Daytime Running Lamp Task Force Side Mirror Turn Signal Task Force Participants in the SAE Signaling and Marking Devices Standards Committee include OEMs, suppliers, consulting firms, government, and other interested parties.