Do you know this lamp?

Robert

Well-Known Member
Joined
Apr 1, 2004
Location
The South

JD

Well-Known Member
Joined
Jan 1, 2005
Location
North Wales PA
Tricky because of the Edison base. Most projection lamps are Medium Prefocus bases. If you cross to another bulb, make sure you match the LCL of the lamp. (In other words, the center of the filament of the new lamp should be in the same optical position as the cent of the old one was. Unless you are into it for it's value as an antique, you may want to upgrade the base to a medium prefocus. Again, you want to make sure the location of the center of the filament does not change in the fixture.
 

derekleffew

Resident Curmudgeon
Senior Team
Premium Member
Joined
Aug 21, 2007
Location
Las Vegas, NV, USA
From resident lamp guru @ship:
Everything that should fit & work properly has been discontinued.

Type:

Brand:

Description:

Wattage:

Bulb:

Filament
Arc Gap

LCL/MOL

Base:

Notes / CRI

Color Temp

Output:

Life:

JD500w/E2

EYE #85363

(disc) CL, Quartz

500 w

T-4

cc-8

LCL 81mm

E-26

2,950̊K

10,450 Lum

2,000

Q500CL/E26

Bulbrite #612500

(disc) CL, Quartz

500 w

T-4

MOL 4.1/8"

E-26

9,000 Lum

2,000

JD500wF/E2

EYE #85461

(disc) ?Frosted, Quartz

500 w

T-4

cc-8

LCL 81mm

E-26

2,950̊K

9,930 Lum

2,000

CZS

G.E.

(Disc.) (HRG)

500 w

T-10

E-26

CZS

Ushio #1000159

(disc) CL, Incd. Blackened Tip

500 w

T-32mm

c-13D

LCL 76.2mm

E-26

Base Down

3,200̊K

12,500 Lum

25

CZS

Wiko

(disc) CL, Incd. Top Frosted

500 w

T-20

c-13D

LCL 76.2mm

E-26

3,200̊K

12,500 Lum

25

DMS

G.E. #29793

(disc) CL, Incd. (HRG)

500 w

T-20

c-13

LCL 3"

E-26

Base Down ±30̊

3,200̊K

13,200 Lum

50

DMS

Ushio #1000204

(disc) CL, Incd.

500 w

T-64mm

c-13

MOL 76.2mm

E-26

Base Down

3,200̊K

13,200 Lum

50
[TBODY] [/TBODY]
If a G-30 globe fits into a T-20 space, I would switch to a

400G/FL

G.E. #21363

CL, Flood, Brass Base

400 w

G-30

c-5

LCL 3"

E-26

Base Down to Horz.)

6,800 Lum

800
[TBODY] [/TBODY]
 

ship

Senior Team Emeritus
Premium Member
Joined
Mar 29, 2003
Location
Illinois
Thanks Derek for posting and doing my quick response (busy) forwarded.

So now if the G-30 lamp won't fit, or won't have enough output in being a different filament type... time to measure up what you have for a completely different lamp and lamp socket so as to make it work. Assuming you want to make it work and the simple solution 400G30FL won't work otherwise. Might still be an antique bulb collector's forum out there. Was a forum I connected to at some point that does re-filamenting and etc. about lamps. Antique Lamp Collector's Forum? Sorry, lost my link to them. Such a forum can restore in membership experience your bad lamp, or possibly find some good lamps. Don's Bulbs' as a website also can overprice replacement lamps for your light as a solution. I did check my inventory and didn't have any of this lamp type.

In conversion to another lamp to fuel the light:
Need to change the lamp and lamp socket to the luminaire. (PC term)

The assumed LCL of your lamp is 3" but what isn't known is tne lamp socket height that this lamp seats into for a platform height to re-design a lamp and socket from.

Need to measure a screwed in lamp with fiament for measuring it's LCL as it were to the platform the lamp socket mounts to. Should be somewhere around 3" for the lamp L