GE G8.5 brochure Specification summary

Specification summary*

Ordering Information

Description	Wattage	Colour	Product Code
CMH20/T/UVC/U/830/G8.5 Plus	20	3000K	39858
CMH35/T/UVC/U/830/G8.5 Plus	35	3000K	43273
CMH35/TC/UVC/U/842/G8.5	35	4200K	26348
CMH70/TC/UVC/U/830/G8.5 Plus	70	3000K	43274
CMH70/T/UVC/U/942/G8.5	70	4200K	26349

General	Units	20W	35W	35W	70W	70W
		3000K	3000K Plus	4200K	3000K Plus	4200K
Product code		39858	43273	26348	43274	26349
Nominal Wattage	W	20	35	35	70	70
Format				Single ended
Bulb type		T4.5	T4.5	T4.5	T4.5	T4.5
Bulb diameter	mm	14.5	14.5	14.5	14.5	14.5
Bulb material				UVC Quartz
Bulb finish				Clear
Arc Gap	mm	3.35	4.65	4.3	7.4	5.5
Base		G8.5	G8.5	G8.5	G8.5	G8.5
Operating Conditions
Burning position				Universal
Luminaire characteristics				Enclosed

Notes:

1)Lamp voltage in the luminaire should not increase by more than 5V when compared to lamp voltage in free air.

2)Ballast protection required, according to IEC61167.

3)35W & 70W data is based on operation from a conventional magnetic ballast. Improved performance can be achieved using an electronic ballast.

4)35W 4200K CMH lamp is based on operation from an electronic ballast. Lamps can run on conventional ballast with a small reduction in performance.

5)20W designed for operation only from an electronic ballast.

Electrical Characteristics *

Lamp power	W	20	39	39	72	72
Lamp voltage	V	90	90	90	90	90
Lamp current	A	0.226	0.50	0.50	0.98	0.98
Max. Ignition Voltage	kV	***	5.0	5.0	5.0	5.0
Min. Ignition Voltage	kV	***	3.5	3.5	3.5	3.5
Extinction voltage	%	***	90 (Max.)	90 (Max.)	90 (Max.)	90 (Max.)
(% of rated input voltage)

*The specification provides typical performance data for 35W & 70W operating from a 50Hz mains sinewave supply at nominal power. Actual values depend on ballast, supply voltage and application 20W to be used only with an electronic ballast

*** See additional notes on electronic ballast requirements for 20W

Specification summary*

Photometric Characteristics		20W	35W	35W	70W	70W
		3000K	3000K Plus	4200K	3000K Plus	4200K
Product code		39858	43237	26348	43274	26349
100 hrs Lumens	lm	1650	3400	3150	6200	6000
Typical Lumen change
with burning position	lm			100-150
– vertical to horizontal
Typical voltage change
with burning position	V			8
– vertical to horizontal
Correlated Colour Temperature	K	3000	3000	4200	3000	4200
Chromaticity X		0.435	0.435	0.475	0.435	0.475
Chromaticity Y		0.400	0.400	0.370	0.400	0.370
Colour Rendering Index	Ra	80+	84+	88+	80+	90+
Luminous efficacy	lm/W	85	86	80	86	83
Base				G8.5
Starting and Warm-up Characteristics*
Time to start ( at 25 °C )	sec.	< 2	< 2	< 2	< 2	< 2
Time to start - Cold box test at -30 °C	sec.	< 2	< 2	< 2	< 2	< 2
Hot restart time	min.	< 3	< 3	15	15	15
Warm-up time (for 90% lumens)	min.	1.2	1.2	3	3	3

* Typical values (actual values are ballast and ignitor dependent)

Through life Performance*

Lumen maintenance	%	68	68	85	71	77
at 40% rated life (mean lumens)
Average rated life	h	12000	15000	12000	15000	15000

* Life data measured in Vertical Base up position. Performance can be greatly increased in horizontal position.

Maximum Operating temperatures**

Maximum allowed bulb temperature
(horizontal orientation, thermocouple	°C	500	500	500	550	550
attached above burner)
Maximum pinch temperature	°C	300	300	300	300	300
(vertical base up orientation)

*The specification provides typical performance data for 35W & 70W operating from a 50Hz mains sinewave supply at nominal power. Actual values depend on ballast, supply voltage and application 20W to be used only with an electronic ballast – see later for additional notes on electronic ballast requirements.

** Temperatures above which lamp performance or reliability is impaired. Additionally, voltage rise when operated in luminaire should not exceed 5V

*** Photometric characteristics refer to lamp performance after 100hrs burning.

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