- Thread starter jimbo84
- Start date
Yeah halogen, they get a tad warm along with their blinding light. 5.7M lumens, about a grand to buy and a 350 hour lifespan. These are busted, the filaments are continuous but have mechanically failed in the ceramics/pins.
Although the below is a HMI light and takes a different lamp to the above 20kw it gives you an idea of the size.
The bulbs are behind a glass fresnel lens and have a wire grill in front to contain any exploding glass. The meshed rings that can be seen in the front of this lamp are called scrims, made from stainless steel of differing hole sizes they slide in to reduce the lights output by a set amount, half or full stops, while maintaining the colour temperature of the light. Tungsten are balanced to 3200k if they were dimmed you warm up the colour temperature so scrims allow it to be 'dimmed' while maintaining the 3200k colour temperature. The scrims get a bit hot in use.
The bulbs are behind a glass fresnel lens and have a wire grill in front to contain any exploding glass. The meshed rings that can be seen in the front of this lamp are called scrims, made from stainless steel of differing hole sizes they slide in to reduce the lights output by a set amount, half or full stops, while maintaining the colour temperature of the light. Tungsten are balanced to 3200k if they were dimmed you warm up the colour temperature so scrims allow it to be 'dimmed' while maintaining the 3200k colour temperature. The scrims get a bit hot in use.
frank horton
V twins are great but 4"s rule.........
- Messages
- 4,426
- Location
- Crete, Greece
I was told in Calif...
to change a bulb u need 6 men, one to hold the bulb the other five to turn the ladder.....
to change a bulb u need 6 men, one to hold the bulb the other five to turn the ladder.....
Arc Tourist
Member
- Messages
- 5,019
- Location
- Wales
Oooooh, I like that tri-stand.
Arc Tourist
Member
- Messages
- 5,019
- Location
- Wales
7, you forgot to include supervision.
Oooooh, I like that tri-stand.
They're called easylifts. They come in varying sizes. They're well engineered things and have an internal cable winch and each clamping portion has a half inch square drive slot where a glorified ratchet with a crank handle is used to wind up the section. You start at the top section wind it up, lock the clamp, next section etc. until you're up to the required height. There's a safety ratchet on each one that needs depressing to wind it back down.
They have a SWL of 80kg and a lift of around 6m depending on the number of sections. The can get a bit lairy if it's breezy so a couple of guys stand on the legs to weigh them down. They can lift a wheel if the wind gets up even with a man on them. There are loops at the top section for attaching guylines to tie off. They're affectionately known as F'offs due to their weight and the use of language when trying to shift them
This is us 'germanning' an 18kw HMI on a two section easylift off the wagon. To German it: the lamp goes on the ground/tail lift, the stand is leant on its side and lamp spigot is worked into the stand socket and the whole lot is then pivoted up right.
Barking Mat
Cuddler of hedgehogs.
- Messages
- 13,475
- Location
- France, Brittany.
They're called easylifts. They come in varying sizes. They're well engineered things and have an internal cable winch and each clamping portion has a half inch square drive slot where a glorified ratchet with a crank handle is used to wind up the section. You start at the top section wind it up, lock the clamp, next section etc. until you're up to the required height. There's a safety ratchet on each one that needs depressing to wind it back down.
They have a SWL of 80kg and a lift of around 6m depending on the number of sections. The can get a bit lairy if it's breezy so a couple of guys stand on the legs to weigh them down. They can lift a wheel if the wind gets up even with a man on them. There are loops at the top section for attaching guylines to tie off. They're affectionately known as F'offs due to their weight and the use of language when trying to shift them
View attachment 262224
This is us 'germanning' an 18kw HMI on a two section easylift off the wagon. To German it: the lamp goes on the ground/tail lift, the stand is leant on its side and lamp spigot is worked into the stand socket and the whole lot is then pivoted up right.
View attachment 262225
Like the masses of huge extension cables in the van.
Film production?
Arc Tourist
Member
- Messages
- 5,019
- Location
- Wales
Back when I was a kid in the 1960's, I use to marvel when we would see the sky lit up with a carbon arc search light; usually it was for a grand opening of something. There is even a website for and about them...…. www.victorysearchlights.com .
Arc Tourist
Member
- Messages
- 5,019
- Location
- Wales
Whenever I see tripod's I think about portable, stable, telescope use. Thanks for posting.
A lot of 63a cable and then a load of BAC cable which is the big stuff used to connect the bigger lamps, It was mainly TV commercials and music videos but don't do much of it anymore, the traveling up and down the country and hardly being at home killed it for me but still do some of the more local jobs.
570,000 Lumens surely?
Awesome all the same - no thanks to the electric bill
Yeah you're right, miss counting my zeros
There's a company not too far from me that make searchlights, Francis, some of the older ones are stunning things.
Are they still going?
Awesome!
https://francis.co.uk/en_US/
Yeah although their modern ones aren't as good looking as the old ones.
Where I worked it took 3 men to change the light bulbs in the deep freeze. They were gas discharge lights but if one went and you didn't change it quick enough the whole light fitting would fill with water & freeze solid!
So you had 1 man on the forklift with 2 men 30ft up in a cage. One man was thawing the ice in the light fitting with a blowlamp while the other held a large plastic box under him. That was in case the light bulb broke or exploded, we didn't want any glass falling into the pallets of food below us! It was -30 deg C in the freezer & if you took too long the forklift would freeze up requiring a tow to get it out!
So you had 1 man on the forklift with 2 men 30ft up in a cage. One man was thawing the ice in the light fitting with a blowlamp while the other held a large plastic box under him. That was in case the light bulb broke or exploded, we didn't want any glass falling into the pallets of food below us! It was -30 deg C in the freezer & if you took too long the forklift would freeze up requiring a tow to get it out!
