Author Topic: Light bulb  (Read 926 times)

Offline Red89

Light bulb
« on: December 25, 2017, 01:11:11 PM »
I am looking to buy a new light bulb for my factory 89 headlight. I have a stock stator, and I'm wanting a brighter light than factory and one with the slight blue tint to it. What do you guys recommend?

Offline croat1

Re: Light bulb
« Reply #1 on: December 27, 2017, 09:28:54 AM »
I'm no electrical guru (I hate electrical) but I'd say you are limited to the stock bulb due to the stator output.  then again maybe head down to your local auto parts store and see what they have to offer in a H4 bulb (newer bulbs??).  sorry I could not be of more help.


Offline Red89

Re: Light bulb
« Reply #2 on: December 27, 2017, 11:47:56 AM »
That is what I was thinking. Find the brightest H4 bulb that is 60/55 watt

Offline wilkin250r

Re: Light bulb
« Reply #3 on: May 20, 2018, 03:09:01 AM »
Bulbs are generally sold by style/fit.  With the advances in technology, there are many manufacturers making older bulbs styles with new technology.

The stock 89 headlight bulb, as croat1 and Red89 have pointed out, is designated as an H4 Bulb.

Since technology has changed, so has terminology.  The old style bulbs at 55W probably put out about 1000 lumens, but today's LED bulbs are capable of twice the light output and only half the power.  (2000 lumens, 27 watts). With the difference in terminology, it can be difficult to compare.

But the thing that DOESN'T change is the H4 designation.  All H4 bulbs should fit the same, so just do a search for H4 bulbs and you should be able to figure out the rest.

Offline desertR

Re: Light bulb
« Reply #4 on: May 20, 2018, 06:32:45 PM »
Some basic's for those that seem to have forgot; 8)
1. 250R's are an AC system, and LED's won't work unless you change the stator wiring, add a rectifier, and a
2. Watt's are a measurement of output including heat, its not about the brightest bulb, a 55 watt bulb is a 55 watt bulb, some manufacturers change the filament location (focus) with-in the bulb to get the appearance of "bright-ness" but you can't change the physic's of the wattage, I.E/ PIAA's 55=85 BS
3. LED's are rated in Lumens in instead of watts/candlepower, and there is not a clear comparison of the two mathematically as with watts, at best, direct comparison is the best you can do
4. IMO PIAA bulbs are worth the money, but expect reduced bulb life and carry a spare if night riding.
5. Ensure there is no voltage drop to the bulb, the biggest problem with most applications is undersized wiring, and corrosion on connections and such giving a reduced "bright-ness" (voltage) to the bulb.

Offline desertR

Re: Light bulb
« Reply #5 on: May 20, 2018, 06:54:13 PM »
Sorry but I missed one point.
Light output (color) is rated in "kelvin" or K
3000K is yellow
5000k to 5400k is "pure" white
6000k has a slight tint of blue, barely perceptible
6000k and up goes from blue towards violet/purple

Any tint applied to the glass capsule of the bulb will lessen the output, but it may make the light output more favorable.
Blue in the color spectrum the is most easily dispersed, which is why the sky is blue and OPEN/CLOSED signs at business's are not blue, for maximum visibility at distances

Headlights in France are 3000k to 3500k for less glare by law, but illegal in the USA

My intent is to inform but not offend anyone