Do Not Sell My Personal Information Jump to content


Thinking of upgrading IS20 Headlights from 75 Watt to 100 Watt.


Recommended Posts


More heat to dissipate and also current in wires to lamps, I would not like. Better trying more efficient lamps.

  • Like 1
Link to comment
Share on other sites

9 hours ago, miaitken said:

I was wondering if upgrading to a higher wattage bulb in the headlamps from 75W to 100W would create any problems.

You shouldn't even have 75 W bulbs in the standard headlights - they use 55 W bulbs as standard. You risk heat damage if you go too far.

Low beams are protected by 15 A fuses and the high beams by 10 A fuses, and all four bulbs are protected by a 40 A fuse before the relay.

You ideally need 20 A fuses (and higher rated wiring) for 100 W bulbs, so if you are talking about both high and low you need the main circuit/relay/fuse to be 80 A, not 40 A.

Link to comment
Share on other sites

8 hours ago, Herbie said:

^^^^^^ This.

 

41 minutes ago, ColinBarber said:

You shouldn't even have 75 W bulbs in the standard headlights - they use 55 W bulbs as standard. You risk heat damage if you go too far.

Low beams are protected by 15 A fuses and the high beams by 10 A fuses. You ideally need 20 A fuses (and higher rated wiring) for 100 W bulbs.

Thank you for the response1633484275_LexusIS200bulbs.thumb.jpg.af70fec412bfcb56e33bd03d3052fea9.jpg

Sorry I made a basic mistake, thought my main beam was 75W it is actually 60W, see the page from my owners manual.

 

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share





×
×
  • Create New...




Forums


News


Membership