Jump to content


Photo

Practical Light Bulbs


  • Please log in to reply
4 replies to this topic

#1 Wai Choy

Wai Choy
  • Basic Members
  • PipPip
  • 29 posts
  • Student

Posted 24 February 2008 - 10:46 PM

Hi,

On my thesis film we'll have various practical lights in the interior sets, which we're building on a soundstage. We'll be shooting on Vision2 200T 5217, so I assume that the practical lights will need to output a significant amount of foot candles so that the lampshades, etc. will appear to be illuminated from within by the practical light bulbs even though we'll obviously be supplementing the lights with off-camera lights.

My art director and I are buying lamps from consumer places like Bed, Bath, & Beyond, and many of the lights specify "40 watt bulb," "60 watt bulb," etc, which seem to be very low wattages.

What can we do to get the most light output from each of our lamps?

Is there a way to use higher wattage bulbs in the lamps than specified? Are there certain kinds of lightbulbs that would have a higher light output?

Thanks in advance for your help!

Edited by Wai Choy, 24 February 2008 - 10:47 PM.

  • 0

#2 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7374 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 24 February 2008 - 11:49 PM

I'm not sure whether it's recommended, but for short durations I've put up to a 300w bulb from home-depot inside of a lamp. I normally just stick in a 100W, which on a 60w rating you should be mostly, and i stress that, safe. Keep a damned good eye on it though if it starts smoking/melting and i'd not leave it burning all day, myself (powering it up for the shot, and then turning it off for a bit to cool).
  • 0

#3 Christopher Santucci

Christopher Santucci
  • Basic Members
  • PipPipPip
  • 124 posts
  • Cinematographer
  • Buffalo, New York

Posted 24 February 2008 - 11:58 PM

Those practical lamps are WAY underrated for an extra measure of safety. As long as the shade isn't too close to the bulb, you should be fine up to 300 watts, possibly 500 watts.

I like to use the JDD type jacketed halogen globes:

http://www.lightbulb...1/CTGY/JDD Type

Or these:

http://www.buylighti...flood-s/164.htm
  • 0

#4 Frank DiPaola

Frank DiPaola
  • Basic Members
  • PipPip
  • 13 posts
  • Gaffer

Posted 25 February 2008 - 12:58 AM

Since you're going through a lampshade anyway you may want to consider using clear globes vs their "soft white" counterparts.
  • 0

#5 Kevin Zanit

Kevin Zanit
  • Sustaining Members
  • 1223 posts
  • Cinematographer
  • LA

Posted 25 February 2008 - 01:11 AM

You can also overpower the lamp through a VariAC and give it higher voltage. Should be fine temporarily, but turn it off between takes and during downtime.
  • 0


Abel Cine

Ritter Battery

Glidecam

Aerial Filmworks

FJS International, LLC

CineLab

Gamma Ray Digital Inc

Technodolly

Willys Widgets

New Pro Video - New and Used Equipment

rebotnix Technologies

Metropolis Post

Tai Audio

Media Blackout - Custom Cables and AKS

The Slider

Wooden Camera

Visual Products

Rig Wheels Passport

CineTape

Paralinx LLC

Broadcast Solutions Inc

Visual Products

Tai Audio

Rig Wheels Passport

Glidecam

Aerial Filmworks

Metropolis Post

The Slider

Broadcast Solutions Inc

Gamma Ray Digital Inc

CineTape

Wooden Camera

Technodolly

Ritter Battery

Paralinx LLC

FJS International, LLC

CineLab

rebotnix Technologies

Abel Cine

New Pro Video - New and Used Equipment

Media Blackout - Custom Cables and AKS

Willys Widgets