My friend has just purchased a new (secondhand) Toyota 100 series Sahara. I have to admit that it is very nice to drive. It has HID lights. Not sure if they are standard fitment or not, but when I switch to High Beam, the Low Beams lights seem to stay on as well. Whilst it gives a brilliant spread of light, I don't think that this is correct, because even though they are probably drawing only about 35 watts each, the fact that you have 2 beams operating within the same light must mean that things will get hot. Do low beams normally stay on when high beam is activated?

I know this is a little different, although the principal may be the same. I have standard magna lights. Im running low beam HIDs in the h4's then standard high beams in the h1's.

When i pull high beams on, the hids turn off, as they are only single filament. So could be right with his cruiser?

Do low beams normally stay on when high beam is activated?
Yes. For example, my dad has a Territory with a combined low/high (H4), and a dedicated high beam. When the high beams are turned on, the H4s switch to high, and the dedicated high beams come on too.

On the Magna parabolics, the low beam stays on when the high beam comes on too. I have 35w HIDs installed in both without issue....

Red: Have you wired your para's so the low beam is on when the high beam is activated? Cos with my para's, as well as the standard lights before, its either one or the other (unless you hold back the lever).

Red: Have you wired your para's so the low beam is on when the high beam is activated?
My car came with parabolic lights stock, I didn't change anything wiring-wise. Even before the HIDs, the lows stayed on with the highs.

Cos with my para's, as well as the standard lights before, its either one or the other (unless you hold back the lever).
Don't the standard lights have dual filament (low/high) H4s, which means the 'low' becomes 'high' in addition to the dedicated 'high'?

Thanks fro your replies so far. My main concern is that with teh 100 series L/C, it appears to be one headlight only on each side. Therefore, when high beam is selected, it appears ot have both Hi and Low on at the same time in the same light enclosure. Hence my concern about overheating. When I next see the vehicle, I'll look closer at it and check if the arragnement within the lights.

Looking at these photos (http://www.carsales.com.au/dealer/details/toyota-landcruiser-2003-10812776?cr=2&vertical=Car&Range=Price:Min,Max~1|Mileage:Min,Max|Year:Min,Max |Seats:Min,Max|EngineSize:Min,Max&silo=Stock&sort=default&eapi=2&__N=1216%201246%201247%201252%201282&distance=25&find=UZJ100R%20SAHARA|CarAll), it looks like the 100 series has a single bulb (presumably H4 low/high) in each headlight? This wouldn't be uncommon - my brother's Holden Jackaroo has a single low/high in each headlight, as does my neighbour's current-model 4WD Hilux.

It looks like the 200 series has two bulbs (presumably a low/high and a high) - photo (http://www.carsales.com.au/bncis/details/toyota-landcruiser-2011-11771870?cr=1&vertical=Car&Range=Price:Min,Max~1|Mileage:Min,Max|Year:Min,Max |Seats:Min,Max|EngineSize:Min,Max&silo=Stock&sort=default&eapi=2&__N=1216%201246%201247%201252%201282&distance=25&find=UZJ200R%20SAHARA|CarAll).

Red Valdez: That is what I mean. If the Sahara has H4 type bulbs, I would expect that Low beam goes off when Hi Beam is selected. That happens with all the cars I know of. Now, if the Sahara had HID's as standard, (and I suspect that it may), then they would need 2 separate bulbs. This vehicle is not exactly original condition, so it may be that someone has fitted HID's in the past

It is a beautiful light on hi Beam - it is WHITE and starts virtually at the front bumper and goes for well beyond the speeds I would drive at night