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

[miaitken]

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

[Zotto]

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

[Herbie]

^^^^^^ This.

[NemesisUK]

I also think you'll find the higher wattage bulbs are for off road use only i.e. not road legal in the UK

https://www.autobulbsdirect.co.uk/blog/power-bulbs/

[ColinBarber]

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.

[miaitken]

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 response

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

 

[miaitken]

I have decided to remain with the bulbs fitted.

[Spock66]

You can get higher spec bulbs of the correct wattage that are fully road legal.

https://www.amazon.co.uk/generation-brightness-headlamp-64210NL-HCB-passenger/dp/B07FXRDJV7/ref=asc_df_B07FXRDJV7/?tag=googshopuk-21&linkCode=df0&hvadid=310764720204&hvpos=&hvnetw=g&hvrand=9162887651927945787&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006826&hvtargid=pla-592557309357&th=1