Advice on Lighting

tandi said

waist.it said

Simondclarke Well, it's your bat and your ball to play any way you wish. But for the money you're contemplating paying for another battery powered unit, you could look on eBay or similar and buy yourself a complete set of 2 x mains energised flash-heads c/w stands, with enough grunt to do the job properly, in one easy hit. They'd also have enough energy to use the brollies as reflectors (much softer and more even spray of light). No need for the third light. If you lived closer, I'd even lend you a set of mine to try.

As an aside, just to clear up any confusion and ensure we are all singing from the same proverbial hymn-sheet:

• 1 Ws (watt-second) = 1 Joule.

The SI unit for energy is the Joule. The term "Ws" is confusing because many people wrongly assume that "Ws" means watts. I'm guessing "Ws" was coined predominantly for the US market, where it seems a lot of folks are still a tad confused by the metric system. :-)

Edited by waist.it

I'm on dangerous ground here because my education and memory is failing me. But 1 Watt is 1 Joule Second, 1 Watt Hour is 3600 Joules. If you have a 10w light bulb, that bulb is putting out 10 joules every seconds

Almost right.

1 watt = 1 joule per second = 1 J/s

Multiply both sites by seconds: 1 watt-second (or more correctly 1watt.second) = 1 Joule

waist.it said

tandi said

waist.it said

Simondclarke Well, it's your bat and your ball to play any way you wish. But for the money you're contemplating paying for another battery powered unit, you could look on eBay or similar and buy yourself a complete set of 2 x mains energised flash-heads c/w stands, with enough grunt to do the job properly, in one easy hit. They'd also have enough energy to use the brollies as reflectors (much softer and more even spray of light). No need for the third light. If you lived closer, I'd even lend you a set of mine to try.

As an aside, just to clear up any confusion and ensure we are all singing from the same proverbial hymn-sheet:

• 1 Ws (watt-second) = 1 Joule.

The SI unit for energy is the Joule. The term "Ws" is confusing because many people wrongly assume that "Ws" means watts. I'm guessing "Ws" was coined predominantly for the US market, where it seems a lot of folks are still a tad confused by the metric system. :-)

Edited by waist.it

I'm on dangerous ground here because my education and memory is failing me. But 1 Watt is 1 Joule Second, 1 Watt Hour is 3600 Joules. If you have a 10w light bulb, that bulb is putting out 10 joules every seconds

Almost right.

1 watt = 1 joule per second = 1 J/s

Multiply both sites by seconds: 1 watt-second (or more correctly 1watt.second) = 1 Joule

Did I say that? Electrical items are in watts, a joules is 1 watt second, known as a joule, a watt is 1 watt second, known as a watt?

tandi said

waist.it said

tandi said

waist.it said

Simondclarke Well, it's your bat and your ball to play any way you wish. But for the money you're contemplating paying for another battery powered unit, you could look on eBay or similar and buy yourself a complete set of 2 x mains energised flash-heads c/w stands, with enough grunt to do the job properly, in one easy hit. They'd also have enough energy to use the brollies as reflectors (much softer and more even spray of light). No need for the third light. If you lived closer, I'd even lend you a set of mine to try.

As an aside, just to clear up any confusion and ensure we are all singing from the same proverbial hymn-sheet:

• 1 Ws (watt-second) = 1 Joule.

The SI unit for energy is the Joule. The term "Ws" is confusing because many people wrongly assume that "Ws" means watts. I'm guessing "Ws" was coined predominantly for the US market, where it seems a lot of folks are still a tad confused by the metric system. :-)

Edited by waist.it

I'm on dangerous ground here because my education and memory is failing me. But 1 Watt is 1 Joule Second, 1 Watt Hour is 3600 Joules. If you have a 10w light bulb, that bulb is putting out 10 joules every seconds

Almost right.

1 watt = 1 joule per second = 1 J/s

Multiply both sites by seconds: 1 watt-second (or more correctly 1watt.second) = 1 Joule

Did I say that? Electrical items are in watts, a joules is 1 watt second, known as a joule, a watt is 1 watt second, known as a watt?

Sorry but yes,  you did say that. :-)

waist.it said

Sorry but yes,  you did say that. :-)

wow I an wrong? I thought I got it right, I will stop trying to be clever , apologies :-)

tandi said

waist.it said

Sorry but yes,  you did say that. :-)

wow I an wrong? I thought I got it right, I will stop trying to be clever , apologies :-)

No worries. Easily done. :-)

Just to tidy up the algebra, perhaps make the relationship between energy, power and time a little easier to visualise...

Power (W) x time (s) = energy (J)

∴ Power (W) = energy ÷ time (J/s)

:-)

Edited by waist.it

I always think it is better to have lghts that are more than strong enough, you can always turn them down, the set of lights I purchased were from a studio in London and were all powerful

lights but most could be turned down to a fraction of there full power, But it shows large areas /studios  strong lights are the best if you  are shooting with soft/boxes and umberellas  you will reduce the light power you have, so it is always nice to have some in reserve.

1 Hensel Nova 2400 DL power pack of 2400 Ws in a 120cm deep octa without diffusors from the front,
and two Hensel Expert D1000 compact mono heads from left and right behind as rimlight.

just wondering how this shoot went, please post a follow up :-)

I had a family group shot sprung on me when doing an all day christening function. It was in a marquee in their garden they were positioned in a tiered manner with 3 rows of straw bales stacked up raising towards the back, about 20 people in the shot. I used a Lencarta safari 600w ringlash mounted on Medium Format digi camera... the straw bales had already been positioned. In they trotted and pop done, there was a reasonable ambient. Surprised how well it turned out, light worked just fine.

The reason I used the ringflash was because it was all I had with me, probably the hottest and certainly the brightest day of the year with the garden shots impossible to capture due to the power of the sun, the shadows were far from flattering. The whole event was shot with the ringflash outdoors too, actually the best choice I accidentally made. This had about 100+ attendees and kids everywhere, catering, bar, ice cream van and all that nonsense.....that's a shoot I'll never do as a favour again.