LED daytime running lights EV power draw?

Discussion in 'Prime Main Forum (2017-Current)' started by hidaven, Nov 9, 2017.

  1. hidaven

    hidaven Junior Member

    Joined:
    Feb 29, 2008
    19
    4
    0
    Location:
    NJ
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    Are you all turning the daytime running lights off for increased EV range or is it not worth it?

    Thx!
     
  2. Db17

    Db17 Member

    Joined:
    Jan 9, 2017
    150
    64
    0
    Location:
    Visalia, CA
    Vehicle:
    2021 Prius Prime
    Model:
    Limited
    Since they are LEDs i doubt there is much draw on the battery.
     
  3. Mark57

    Mark57 2021 Tesla Model 3 LR AWD

    Joined:
    Aug 14, 2009
    2,945
    2,722
    0
    Location:
    OK
    Vehicle:
    Other Electric Vehicle
    Model:
    N/A
    I'd think the very tiny number of yards gained in EV driving range is not worth the increased chance of some idiot not noticing you because the DRL's were off. Safety first day to day. Experiment for fun in a controlled area with no other idiots around you or at least in a rural situation.
     
    #3 Mark57, Nov 10, 2017
    Last edited: Nov 10, 2017
    Bob Comer, WilDavis, E-GINO and 2 others like this.
  4. PT Guy

    PT Guy Senior Member

    Joined:
    Nov 23, 2016
    801
    570
    0
    Location:
    Washington, the state
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    Mark nailed it. Three rules:
    Drive safely
    Drive courteously
    Drive efficiently
    (in that order)
     
  5. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    14,334
    7,828
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    I believe your American-market 2008 does not have DRLs. Though if it is a Canadian import, it will have DRLs, most likely reduced-power incandescent highbeams.

    At a mere 14 watts on my 2012, my LED DRLs are on full time whenever higher level lighting is not. This is less power than any incandescent version. On my earlier Prius and Legacy without DRLs, I frequently turned on full lighting (100+ watts) for the increased safety, it was worth it during our dreary overcast days (i.e. half of them).
     
  6. David Beale

    David Beale Senior Member

    Joined:
    Jul 24, 2006
    5,963
    1,954
    0
    Location:
    Edmonton Alberta
    Vehicle:
    2012 Prius
    Does the Prime even use the headlamp "bulbs" for US DRLs? Many cars don't. I can't check. We aren't allowed to have or look at a Prime until next year. ;)

    Do note, for poster above, if a Canadian Prius you can't turn off DRLs, so in that case the question would be moot. ;)
     
    Gaëtan Lafrance likes this.
  7. Lucifer

    Lucifer Senior Member

    Joined:
    Aug 23, 2015
    1,011
    482
    0
    Location:
    Nh
    Vehicle:
    2017 Prius Prime
    Model:
    Plug-in Advanced
    I turn the lights to the third click, my front markers are on,as are my rear lights, I’m not afraid of what’s in front of me, I want the people behind me to spot me before nudging me. Drl’s leave the rear lights off.
     
    Trollbait likes this.
  8. Trollbait

    Trollbait It's a D&D thing

    Joined:
    Feb 7, 2006
    16,164
    7,517
    0
    Location:
    eastern Pennsylvania
    Vehicle:
    Other Non-Hybrid
    The NHSTA stands with the effectiveness of DRLs in the US has not been conclusively shown in the research. Otherwise, they would be mandatory.

    I turn my DRLs off, but I don't have LEDs. With those, I would not worry about EV range.

    In mist, haze, and fog, I leave the DRLs on because it is an auto system, and the head and tail lights get turned on in those conditions.
     
  9. Skylis A

    Skylis A Senior Member

    Joined:
    May 20, 2013
    1,144
    861
    0
    Location:
    Maine
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Advanced
    According to my ScanGauge II, using the heated steering wheel uses only about 0.1 amps from the battery, and the DRL less than 0.1 amps, because I do not even see the change in current at the tenths place. So, let's say that you commute at a mean speed of something like 35 mph using 20 amps from the battery. Without DRL or the heated steering wheel, you might be able to go 30.0 miles without DRL. With DRL and heated steering wheel on the same trip, you would still be able to go 29.9 miles on the same battery charge. That 0.1 mile difference is even smaller if you're just using DRL and no heat. So, you decide if that negligible range difference is important to you especially around sunrise or sunset. (Also vote for your favorite cat in the links above!)
     
Loading...