"Lightbest manufacture UV germicidal lamps with two types of high-quality fused quartz, including doped fused quartz type and clear fused quartz, which emit different wavelength of UV energy. Ozone-free (L) lamps, made with doped fused quartz which blocks the transmission of 185nm energy, emit approximately 95% of the ultraviolet energy at the mercury resonance wavelength of 253.7nm. This wavelength is the region of maximum germicidal effectiveness and is highly lethal to virus, bacteria, protozoa and mold. Very-High (VH) ozone generating lamps, made with nature clear fused quartz which can transmit 185nm and 253.7nm UV energy. 185nm can not kill bacterial or virus directly, however, it can produce abundant of ozone (O₃) from oxygen (O₂) in air. Ozone can break cell walls of microbial so that immediately kill microorganism acting as strong oxidizers and deoxidizers."Preheat Start germicidal lamps are operated by a preheat start circuit that employs a relatively compact and economical ballast. The preheat circuit requires four electrical connections per lamp and a slight to moderate delay is needed to start the lamp. Some modern electronic ballasts are capable of instant starting a preheat lamp, or available by changing the circuit. These germicidal lamps are extensively applied in water treatment, air purification and surface sterilization. Instant Start germicidal lamps are instant starting and utilize a coil filament on each end which operates hot cathode. Lamp life is determined by the life of the electrodes and is affected by the frequency of starting. These germicidal lamps are extensively applied in air purification and duct systems (such as HVAC).

Model Number	Lamp Dimensions(mm)			Power	Current	Voltage	UV Output at 1 Meter		Rated Life
	Tube Diam	Length	Arc Length	(W)	(mA)	(V)	(μw/cm²)	(W)	(H)
GPH135T5L/4P	15	135	55	4	180	28	16	1.5	9000
GPH212T5L/4P	15	212	132	10	180	30	22	2.0	9000
GPH238T5L/4P	15	238	158	11	425	32	27	2.7	9000
GPH245T5L/4P	15	245	165	12	425	35	28	2.8	9000
GPH250T5L/4P	15	250	170	12	425	36	29	3.0	9000
GPH254T5L/4P	15	254	174	12	425	37	30	3.2	9000
GPH275T5L/4P	15	275	195	13	425	39	34	3.5	9000
GPH287T5L/4P	15	287	207	14	425	41	40	4.0	9000
GPH303T5L/4P	15	303	222	15	425	43	42	4.1	9000
GPH330T5L/4P	15	330	250	17	425	44	45	4.5	9000
GPH357T5L/4P	15	357	297	18	425	51	54	5.7	9000
GPH436T5L/4P	15	436	356	21	425	62	72	7.3	9000
GPH450T5L/4P	15	450	370	22	425	64	74	7.5	9000
GPH463T5L/4P	15	463	383	23	425	66	78	8.0	9000
GPH550T5L/4P	15	550	470	28	425	69	85	8.9	9000
GPH620T5L/4P	15	620	540	30	425	80	98	9.8	9000
GPH645T5L/4P	15	645	565	32	425	85	100	10.0	9000
GPH650T5L/4P	15	650	570	34	425	90	105	10.6	9000
GPH793T5L/4P	15	793	713	38	425	112	120	13.0	9000
GPH810T5L/4P	15	810	730	39	425	115	130	14.5	9000
GPH843T5L/4P	15	843	762	41	425	120	150	15.0	9000
GPH1148T5L/4P	15	1148	1068	55	425	165	180	22.0	9000
GPH1554T5L/4P	15	1554	1474	75	425	220	240	33.0	9000
GPH1630T5L/4P	15	1630	1550	79	425	231	250	34.5	9000
* All the above lamps can be made as High Ozone (VH) type 185nm * Customized lamps to your needs