IP20 28 Watt High-Frequency Round Bulkhead Emergency version c/w Opal Diffuser and White Base. 2D 28 Watt 3500k 4-pin lamp supplied (replacement lamp product code 2D28W4P). High-frequency electronic ballast/battery pack inverter. 3-hour battery is 4000mAh @ 3.6v. Power factor rating of 0.11 230m max current. Electrical termination via 2A fused 15 Amp connector block c/w cord grip. Overall diameter 410mm, overall depth 110mm. Non-dimmable. Can be non-maintained as well as maintained.