D1S has the igniter integrated into the bulb, whilst the D2S has the igniter either in the ballast or in the cable between the ballast and the bulb. D1S is the newer technology of the 2 and offers many benefits over D2S such as less noise (EMI and RFI) and allows for a much longer cable from ballast to lamp 3 – 6m (10 – 20′) for D1S, only 0.3 – 0.9m (1 – 3′) maximum for D2S past the igniter. Since the D1S has the igniter integrated into the bulb, this offers a safer alternative to the D2S.
The D1S / D2S system produces 91 lumens per watt for comparable halogen sources, providing: more light to work with; improved spread from side to side; improved foreground illumination and improved down the road illumination.
Depending on your current system, APS can supply you with both D1S and D2S systems.
Bulb Life: ~2,500+ hrs (actual life being attained on mine site applications)
Color Temp: Osram ~4,200K Phillips ~4,100K
OEM parts cross reference numbers:
AD1S-OG5 (OEM Part No. 39663)
AD2S-OG5 (OEM Part No. 66240)
AD1SG-0G5 (OEM Part No. 84010, 66142, 2908160 (85392990) (003233244), 66144, 534661)
Osram D1S Xenarc Bulb 12-24V 35W (Osram – ABL Only #66142)
Sell Qty: Each
Osram D1S Xenarc 12/24V 35W bulb / 42W system, built-in ignitor, (OEM: Osram Part No. 39663)
Osram D2S Xenarc 12/24V 35W bulb / 42W system, AD2S-OG5 (Osram Part No. 66240)